Hello,

We conducted an experiment for Early Hints (chromestatus
<https://chromestatus.com/feature/5207422375297024>) with partners in Q3 -
Q4, 2021. The experiment data suggests that the performance impact is
highly positive. Based on these insights, we are confident that Early Hints
will be a viable alternative to H/2 Push for performance use cases. In
addition, by design Early Hints will not run into the overpushing concerns
that bogged down H/2 Push. We are working with some of our partners to
share a bit more details.

Next steps (for Early Hints)

We are actively working on finalizing the shipping plan / timeline. In
particular, Early Hints requires updating multiple specs. Once our plan
becomes clearer, the details will be shared on a new Intent to Ship thread.

Non performance use cases
For other perceived use cases beyond performance improvements, we recommend
sharing more details over at WICG Discourse <https://discourse.wicg.io/>
with a focus on the problem you are trying to solve rather than how H/2
Push could be used. In addition, if you currently rely on H/2 Push in ways
that Early Hints can’t address, please share details
<https://discourse.wicg.io/> about how critical this is to your
product/service, on top of your use case.

Thanks
Daisuke

On Sun, Feb 20, 2022 at 6:40 PM Morgaine <rekt...@gmail.com> wrote:

> I'm not sure if you are being deliberately cruel & malicious, or just
> accidentally cruel. Web developers have been begging for Fetch to please
> for the love of everything holy please report HTTP PUSH responses for 3/4
> of a decade now, so we might implement Webpush Protocol or other similar
> reactive techniques via using Push. There have been a couple explorations
> of this, but after a series of proposals, nothing has materialized, nothing
> has developed. Rather than ever making PUSH useful, rather than acknowledge
> that PUSH could implement a reactive, Webpush Protocl like system, you seem
> intent on using negligence to destroy the baby before it has a chance. This
> has been requested & begged for, there's been a couple spins, but you seem
> ready to destroy possibility in this deprecation, before even having made
> the most minimum bid to make the technology useful. Please, heed
> https://github.com/whatwg/fetch/issues/51 & try to do some little bit of
> good in the world, before you go running off macabely destroying
> possibility.
>
> Chrome had a number of attempts where some good responsible smart
> actually-know-something developers saw that PUSH could be useful, and
> proposed trying to make Fetch spec be useful, proposed making PUSH useful.
> That the current crop of developers doesn't understand & see this
> possibility, either denies or is ignorant to the sad long history of
> begging, pretty please, to let us observe & react to PUSH requests, is a
> tragedy. We are headed for using HTTP3-over-WebTransport, because ya'll are
> sending in the wrecking ball, rather than following up & doing the bear
> minimum, most essential, most basic spec-authoring work on Fetch, that was
> begged for, pleaded for, for 3/4 of a decade now. This is such a sad sad
> route, and it's going to be such a gross boondogle working around the
> apathy browser developers gave for PUSH, their unlove, their incapability
> to provide even some simple basic capabilities to use PUSH.
> https://github.com/whatwg/fetch/issues/51 needed some love. It still
> does. Turn the ship around. Do the minimum viable feature, before you
> decide to axe it. You might even be able to not put the PUSH into cache, if
> that makes you happy, so long as you provide an alternative means to
> receive the PUSH responses to a Fetch. Doing nothing, permitting nothing:
> that's such a misdeed. Please, again, don't do this. And don't tell us
> something that is deeply related, that is at the heart of this disaster,
> that has gone unaddressed & unimprove for so long, is unrelated.
> On Wednesday, June 30, 2021 at 9:42:26 AM UTC-4 las...@chromium.org wrote:
>
>> No, the Push API (
>> https://developer.mozilla.org/en-US/docs/Web/API/Push_API) is entirely
>> unrelated other than the name.
>>
>> -Brad
>>
>> On Wed, Jun 30, 2021, 9:00 AM Vito De Giosa <vito.d...@gmail.com> wrote:
>>
>>> Does it mean that also that the webpush protocol, Push Api won't work
>>> anymore?
>>
>>
>>>
>>> On Monday, 28 June 2021 at 17:15:54 UTC+2 pme...@chromium.org wrote:
>>>
>>>> It feels like there are a lot of different things going on here and it
>>>> might be useful to unpack it a bit.
>>>>
>>>> Web Vitals thresholds - they aren't a hard line where you pass or you
>>>> don't. The last updates from the team explained that each metric is looked
>>>> at independently and there is a progressive boost in the "needs
>>>> improvement" zone based on how close a given URL is to the "good"
>>>> threshold. That doesn't really help if you're being held to the "number of
>>>> URLs that need improvement" in the search console but there is not much
>>>> practical difference between a 2.6 and a 2.5 LCP (not like the cliff that
>>>> it initially sounded like it would be).
>>>>
>>>> Layout Shifts from late-loading fonts - Using PUSH to try to fix this
>>>> race condition feels like the wrong tool for the job. Even with
>>>> font-display: block it is possible that a text element won't be sized
>>>> correctly until the font loads, causing something after it in the DOM to be
>>>> moved. Preload can help get the font loaded sooner so it will be there at
>>>> layout time more often but it will still be racy. PUSH is also still racy
>>>> but makes it even more likely that the font will be there early but at the
>>>> cost of delaying literally everything else (including the HTML in a lot of
>>>> cases). It feels like we need a better primitive to tell the browser to
>>>> block layout until the text sizes are known (if that is something a site
>>>> wants to do) so that things can still load asynchronously but the rendering
>>>> can be controlled. It's a lot like CSS blocking layout/render - otherwise
>>>> unstyled content is flashed for FOUC. font-display: block prevents the
>>>> render of text in the wrong font but nothing lets you block incorrect
>>>> layout (that I know of). Fixing that properly rather than wedging fonts
>>>> ahead of everything else is a better fix.
>>>>
>>>> Push sounds like a great solution, particularly when it can be done
>>>> intelligently to not push resources already in cache and if it can exactly
>>>> only fill the wait time while a CDN edge goes back to an origin for the
>>>> HTML but getting those conditions right in practice is extremely rare. In
>>>> virtually every case I have seen, the pushed resources end up delaying the
>>>> HTML itself, the CSS and other render-blocking resources. Delaying the HTML
>>>> is particularly bad because it delays the browser's discovery of all of the
>>>> other resources on the page.  Preload works with the normal document
>>>> parsing and resource discovery, letting preloaded resources intermix with
>>>> other important resources and giving the dev, browsers and origins more
>>>> control over prioritization.
>>>>
>>>> On Friday, June 25, 2021 at 7:32:05 PM UTC-4 Brad Lassey wrote:
>>>>
>>>>> On Fri, Jun 25, 2021, 6:58 PM Andrew Wilder <and...@andrewwilder.com>
>>>>> wrote:
>>>>>
>>>>>> Interesting, thanks Brad.
>>>>>>
>>>>>> I'd imagine that the performance benefit is actually greater for
>>>>>> sites that don't use a CDN at all, since one RT is likely to take much
>>>>>> longer
>>>>>>
>>>>> Due to initial window sizes, one RT worth of data is measured in
>>>>> bytes, not time and does not vary based on round trip times.
>>>>>
>>>>>> ... so if you're only looking at CDNs, that might explain part of the
>>>>>> difference?
>>>>>>
>>>>>
>>>>> We looked at all sites that were using Push, but in addition cut the
>>>>> data by CDN to look for correlations.
>>>>>
>>>>>>
>>>>>> With the extremely tight requirements of Core Web Vitals, one
>>>>>> round-trip's time potentially *could* make a significant difference
>>>>>> in some cases.  I was recently working on a site where I just couldn't 
>>>>>> get
>>>>>> the Largest Contentful Paint metric to pass the 75th percentile of 2.5s 
>>>>>> in
>>>>>> CRuX.  I was stuck, soooo close, at 2.6s. (And it was testing great in 
>>>>>> Lab
>>>>>> Data...just not in the field data, frustratingly)
>>>>>>
>>>>> I'd suggest you look at how big your initial resources are and what's
>>>>> left over after the initial window. Again, the reference to a round trip 
>>>>> is
>>>>> to the amount of data, not time.
>>>>>
>>>>>
>>>>>> A roundtrip can take well over 100ms, so that alone could be enough
>>>>>> to shave off 0.1s under the right conditions, or maybe more, to get the
>>>>>> site to pass CWV.  But I also stopped short of actually bothering
>>>>>> to implement and test this when I saw this thread (I wasn't even sure if
>>>>>> Chrome was still working for Server Push or not -- though I see that was
>>>>>> answered a few messages back.)
>>>>>>
>>>>>> I don't think I would have argued this point before core web vitals,
>>>>>> since one round-trip does seem nearly negligible -- but because now we 
>>>>>> have
>>>>>> *absolute* metrics we need to hit, which are pretty tough in some
>>>>>> cases, I think keeping this one additional tool in the toolbelt may be
>>>>>> worthwhile...
>>>>>>
>>>>>> Thanks again,
>>>>>> Andrew
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, Jun 25, 2021 at 3:28 PM Brad Lassey <las...@chromium.org>
>>>>>> wrote:
>>>>>>
>>>>>>> On Fri, Jun 25, 2021, 4:53 PM Andrew Wilder <and...@andrewwilder.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Brad, thanks for the clarification.  We're definitely utilizing
>>>>>>>> preload -- that's pretty much "table stakes" for passing Core Web 
>>>>>>>> Vitals at
>>>>>>>> this point. We're also utilizing many other tools, including Critical 
>>>>>>>> Path
>>>>>>>> CSS and delaying JavaScript until after user interaction. Those are far
>>>>>>>> more complicated to implement properly than Server Push (especially 
>>>>>>>> with
>>>>>>>> Cloudflare's excellent implementation, as Francesco pointed out).
>>>>>>>>
>>>>>>>> The new Page Experience requirements from Google have changed the
>>>>>>>> game when it comes to site speed. Previously, speed was known to be a
>>>>>>>> ranking factor, but the details were secret, and it was more of a
>>>>>>>> "relative" factor compared to the competition. "Just be faster than 
>>>>>>>> your
>>>>>>>> competition" was sufficient before.
>>>>>>>>
>>>>>>>> But with Core Web Vitals, the requirements are now absolute
>>>>>>>> criteria, and it's pass/fail regardless of other sites in your 
>>>>>>>> vertical.
>>>>>>>> There's no gray area here -- and for many sites, passing all three CWV
>>>>>>>> criteria, while keeping the features that site owners need, is quite
>>>>>>>> challenging.
>>>>>>>>
>>>>>>>> Furthermore, you mentioned "this depreciation represents a low risk
>>>>>>>> of web breakage."  But keeping Server Push is not detrimental - it has 
>>>>>>>> *zero
>>>>>>>> risk* of web breakage. So why remove support for it?
>>>>>>>>
>>>>>>>> So it seems we have one department of Google (Search) pushing for a
>>>>>>>> faster web, and another Department (Chrome) considering taking away a 
>>>>>>>> tool
>>>>>>>> that, with proper implementation, should actually help achieve that 
>>>>>>>> goal.
>>>>>>>>
>>>>>>>> Having said that, the truly important question that we're kind of
>>>>>>>> dancing around is:* Is Server Push actually beneficial?  *
>>>>>>>>
>>>>>>>> If the answer to that is "yes," then I think it's better for Chrome
>>>>>>>> to keep supporting it -- and, instead of killing it, to make efforts to
>>>>>>>> increase adoption.
>>>>>>>>
>>>>>>>> But if you're able to demonstrate that, when properly implemented,
>>>>>>>> it has no *actual *speed/CWV benefits compared to using <preload>
>>>>>>>> links in the <head>, I'll be grateful because it means I don't have to
>>>>>>>> spend time finding that out on my own.  :)
>>>>>>>>
>>>>>>> Our data shows that it is not providing a speed benefit in practice
>>>>>>> and in fact is an overall slight performance regression for Chrome 
>>>>>>> users.
>>>>>>>
>>>>>>> As far as differentiating "proper" use versus naive use, I cut the
>>>>>>> data by which CDN hosted each domain and didn't see any one CDN with a 
>>>>>>> net
>>>>>>> performance benefit, which I interpret as not indicating that there is
>>>>>>> necessarily a proper vs improper way to use the feature. This 
>>>>>>> intuitively
>>>>>>> makes sense as the theoretical potential benefit over preload is
>>>>>>> vanishingly small (1 RT worth of data minus your initial resource) and
>>>>>>> depending on the situation very possibly nil, versus the relatively high
>>>>>>> penalty of pushing the wrong thing.
>>>>>>>
>>>>>>>
>>>>>>>> Thanks again,
>>>>>>>> Andrew
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Jun 25, 2021 at 1:25 PM Francesco Montanari <
>>>>>>>> francesco...@outlook.com> wrote:
>>>>>>>>
>>>>>>>>> It's not necessarily complex to implement for the developer.
>>>>>>>>> For example, Cloudflare gives it by default, you just need to add
>>>>>>>>> the HTTP preload header (
>>>>>>>>> https://www.cloudflare.com/it-it/website-optimization/http2/serverpush/
>>>>>>>>> )
>>>>>>>>> and they have a smart implementation of it, they push assets only
>>>>>>>>> at the first visit, they don't push them again when they know the 
>>>>>>>>> browser
>>>>>>>>> should have it already in its cache.
>>>>>>>>>
>>>>>>>>> They also were the first to offer SSL for free to everyone in
>>>>>>>>> 2014, and today nobody would pay for a SSL cert. So good things take 
>>>>>>>>> time
>>>>>>>>> to spread...
>>>>>>>>>
>>>>>>>>> It's just a matter of time, when the WordPress themes start adding
>>>>>>>>> the preload HTTP header for their resources (it's a one-liner in 
>>>>>>>>> PHP), all
>>>>>>>>> the wordpress sites which are on cloudflare will automatically have 
>>>>>>>>> HTTP
>>>>>>>>> push with zero configuration, and the usage stats will rise as well.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Friday, 25 June 2021 at 22:58:41 UTC+3 las...@chromium.org
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Andrew,
>>>>>>>>>> I just want to clarify one point, we are proposing to depreciate
>>>>>>>>>> and remove HTTP Push because it has not proven to provide performance
>>>>>>>>>> benefits over other, less complex and technically burdensome 
>>>>>>>>>> techniques
>>>>>>>>>> such as preload (which I would encourage you to look at if you 
>>>>>>>>>> haven't
>>>>>>>>>> already). The discussion of the amount of usage of Push is largely 
>>>>>>>>>> making
>>>>>>>>>> the case that this depreciation represents a low risk of web 
>>>>>>>>>> breakage.
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>> Brad
>>>>>>>>>>
>>>>>>>>>> On Fri, Jun 25, 2021, 1:08 PM Andrew Wilder <
>>>>>>>>>> and...@andrewwilder.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Sorry, I meant to say that Origin Summary CLS is just over 0.10,
>>>>>>>>>>> and/or LCP is 2.6s or 2.7s.  Just wanted to clear that up so you 
>>>>>>>>>>> don't
>>>>>>>>>>> think I don't know what I'm talking about! 😉
>>>>>>>>>>>
>>>>>>>>>>> On Friday, June 25, 2021 at 10:02:13 AM UTC-7 Andrew Wilder
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> I run an agency that supports and maintains over 500 WordPress
>>>>>>>>>>>> sites -- and we do a lot of site speed optimization work. Most of 
>>>>>>>>>>>> them are
>>>>>>>>>>>> food blogs, and because of their complexity, it's very difficult 
>>>>>>>>>>>> to get
>>>>>>>>>>>> them to pass the three Core Web Vitals requirements (especially 
>>>>>>>>>>>> LCP and
>>>>>>>>>>>> CLS).
>>>>>>>>>>>>
>>>>>>>>>>>> I've been experimenting with Server Push as a way to get assets
>>>>>>>>>>>> loaded faster -- especially web fonts, which are often a source of 
>>>>>>>>>>>> shifts,
>>>>>>>>>>>> as they switch from the default fallback font to the web font. 
>>>>>>>>>>>> Often we run
>>>>>>>>>>>> into situations where the Origin Summary CLS is 2.6 or 2.7 
>>>>>>>>>>>> seconds.  Being
>>>>>>>>>>>> able to get fonts loaded earlier may help prevent shifts as they 
>>>>>>>>>>>> load; or
>>>>>>>>>>>> to shave off even 0.1 second for the LCP element (especially if 
>>>>>>>>>>>> it's an
>>>>>>>>>>>> image) may be enough to get the site to pass CWV completely.
>>>>>>>>>>>>
>>>>>>>>>>>> On some sites we exhausted other ways to speed things up to
>>>>>>>>>>>> pass CWV, and it was starting to look like Server Push might be 
>>>>>>>>>>>> able to get
>>>>>>>>>>>> us across the finish line. But I paused on getting further into 
>>>>>>>>>>>> development
>>>>>>>>>>>> on this, because I found this thread! Unfortunately, you're now 
>>>>>>>>>>>> creating a
>>>>>>>>>>>> self-fulfilling prophecy of killing off Server Push.  By 
>>>>>>>>>>>> announcing that
>>>>>>>>>>>> you're considering removing it -- primarily because not enough 
>>>>>>>>>>>> people use
>>>>>>>>>>>> it -- you're discouraging further people to start using it!  Oh, 
>>>>>>>>>>>> the irony.
>>>>>>>>>>>>
>>>>>>>>>>>> Considering Google's push on site speed and Core Web Vitals, it
>>>>>>>>>>>> seems quite contradictory for you to disable Server Push. Instead, 
>>>>>>>>>>>> it would
>>>>>>>>>>>> be far better to invest more resources into helping people utilize 
>>>>>>>>>>>> it --
>>>>>>>>>>>> and making it more effective to help improve speed and user 
>>>>>>>>>>>> experience.
>>>>>>>>>>>>
>>>>>>>>>>>> On Friday, June 25, 2021 at 8:45:09 AM UTC-7 Maxim Makarov
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Please don't remove HTTP/2 Server Push support
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Monday, June 21, 2021 at 5:32:25 PM UTC+3 b...@chromium.org
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Hi Francesco,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Responding to the first part of your email only: no, HTTP/2
>>>>>>>>>>>>>> push is currently not disabled by default or removed from 
>>>>>>>>>>>>>> Chrome.  However,
>>>>>>>>>>>>>> there is a 1% holdback experiment running on Stable channel to 
>>>>>>>>>>>>>> allow
>>>>>>>>>>>>>> monitoring of *hypothetical* performance benefits.  If push does 
>>>>>>>>>>>>>> not work
>>>>>>>>>>>>>> for you, your browser session might have been randomly assigned 
>>>>>>>>>>>>>> to the
>>>>>>>>>>>>>> experiment.  In that case, restarting Chrome will fix it (with 
>>>>>>>>>>>>>> 99%
>>>>>>>>>>>>>> probability).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Cheers,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Bence
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Sat, Jun 19, 2021 at 3:58 PM Francesco Montanari <
>>>>>>>>>>>>>> francesco...@outlook.com> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Is it already removed? I've implemented it but it doesn't
>>>>>>>>>>>>>>> seem to work in Chrome.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Anyway, please don't kill it.
>>>>>>>>>>>>>>> Now that Google Search is deploying the "web vitals" update,
>>>>>>>>>>>>>>> which makes the loading speed a key factor for ranking, more 
>>>>>>>>>>>>>>> and more
>>>>>>>>>>>>>>> developers are working to improve the sites speed, and pushing 
>>>>>>>>>>>>>>> key assets
>>>>>>>>>>>>>>> would be very helpful.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Monday, 7 June 2021 at 23:25:02 UTC+3 rektide wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Wed, Dec 30, 2020 at 2:11 PM Brad Lassey <
>>>>>>>>>>>>>>>> las...@chromium.org> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> On Wed, Dec 23, 2020 at 10:25 PM Morgaine <
>>>>>>>>>>>>>>>>> rek...@gmail.com> wrote:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> As I stated in the very first reply to this thread, it is
>>>>>>>>>>>>>>>>>> a horrific tragedy that the situation is like this. It's 
>>>>>>>>>>>>>>>>>> been HALF A DECADE
>>>>>>>>>>>>>>>>>> OF IGNORING DEVELOPERS on
>>>>>>>>>>>>>>>>>> https://github.com/whatwg/fetch/issues/65 and
>>>>>>>>>>>>>>>>>> https://github.com/whatwg/fetch/issues/607 , who have
>>>>>>>>>>>>>>>>>> begged for fetch to support push, have BEGGED, & gotten no 
>>>>>>>>>>>>>>>>>> where. To say
>>>>>>>>>>>>>>>>>> that the fetch spec does not mention push is to spit in our 
>>>>>>>>>>>>>>>>>> faces. This is
>>>>>>>>>>>>>>>>>> farce & tragedy. Perhaps it's only ignorance you speak from, 
>>>>>>>>>>>>>>>>>> but I can not
>>>>>>>>>>>>>>>>>> be more hurt to hear you say this. I have repeated time & 
>>>>>>>>>>>>>>>>>> time again in
>>>>>>>>>>>>>>>>>> countless threads the desires for fetch to PLEASE FOR THE 
>>>>>>>>>>>>>>>>>> LOVE OF GOD
>>>>>>>>>>>>>>>>>> support fetch. It's insulting that there has been zero 
>>>>>>>>>>>>>>>>>> progress.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I am sorry that my words had this effect on you. I believe
>>>>>>>>>>>>>>>>> the use cases that you've articulated are being addressed 
>>>>>>>>>>>>>>>>> with WebTransport
>>>>>>>>>>>>>>>>> (https://github.com/w3c/webtransport/). If you don't
>>>>>>>>>>>>>>>>> believe so, can you file issues there to make sure they are 
>>>>>>>>>>>>>>>>> properly
>>>>>>>>>>>>>>>>> considered?
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> It seems farcical to me that we are going to need to run
>>>>>>>>>>>>>>>> HTTP3 over WebTransport to get a usable implementation of Push.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The browser should be good at HTTP. We should have these
>>>>>>>>>>>>>>>> capabilities. Deciding to make everyone invent and bring their 
>>>>>>>>>>>>>>>> own userland
>>>>>>>>>>>>>>>> WebTransport stack to be able to tell that an HTTP resource 
>>>>>>>>>>>>>>>> was pushed is a
>>>>>>>>>>>>>>>> huge waste of bandwidth to send that userland stack, & a 
>>>>>>>>>>>>>>>> colossal mass of
>>>>>>>>>>>>>>>> complexity to do the tunneling, & generates a far far more 
>>>>>>>>>>>>>>>> complex
>>>>>>>>>>>>>>>> networking situation than if the browser would implement the 
>>>>>>>>>>>>>>>> one optional
>>>>>>>>>>>>>>>> part of HTTP. Where-as before an a service might have run on 
>>>>>>>>>>>>>>>> HTTP3, pushed
>>>>>>>>>>>>>>>> a resource, & seen it arrive, the service must host an 
>>>>>>>>>>>>>>>> WebTransport tunnel
>>>>>>>>>>>>>>>> that carries HTTP3 inside of it. Now we have to worry about 
>>>>>>>>>>>>>>>> X-Forwarded-For
>>>>>>>>>>>>>>>> like concerns.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> WebPush Protocol already takes advantage of these
>>>>>>>>>>>>>>>> capabilities, for example, to create a simple to implement, 
>>>>>>>>>>>>>>>> elegant
>>>>>>>>>>>>>>>> notification service, used by all browsers: but without the 
>>>>>>>>>>>>>>>> Fetch standards
>>>>>>>>>>>>>>>> I linked, it is unusable for such obvious cause. Without Push, 
>>>>>>>>>>>>>>>> we grow
>>>>>>>>>>>>>>>> complex systems like grpc-web, which are partial, incomplete, 
>>>>>>>>>>>>>>>> radically
>>>>>>>>>>>>>>>> complex alternatives to what the browser ought just be able to 
>>>>>>>>>>>>>>>> do, what
>>>>>>>>>>>>>>>> only the most minor, long requested additions to Push would 
>>>>>>>>>>>>>>>> have allowed.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> And now here we are, building Early Hints to try to reclaim
>>>>>>>>>>>>>>>> only the most minor, smallest of advantages Push gave us. 
>>>>>>>>>>>>>>>> Focused only on
>>>>>>>>>>>>>>>> this one tiny bit of the puzzle. And told that we must DIY 
>>>>>>>>>>>>>>>> alternatives if
>>>>>>>>>>>>>>>> we want them, using WebTransport, and told that this web 
>>>>>>>>>>>>>>>> browser will not
>>>>>>>>>>>>>>>> support the one optional component of the HTTP standard.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Words have not had an effect on me. This decision continues
>>>>>>>>>>>>>>>> to have a profound & disturbing effect on me, and it should be 
>>>>>>>>>>>>>>>> reversed.
>>>>>>>>>>>>>>>> Hopefully before we need to start implementing HTTP3 over 
>>>>>>>>>>>>>>>> WebTransport, but
>>>>>>>>>>>>>>>> I rather suspect not.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
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