One of the main issues I've found with why a significant number of proposals
are rejected is because it would introduce breaking changes into JavaScript, a
language created over 22 years ago. It doesn't surprise me that people have
suggestions to improve JavaScript that are breaking, popular syntax seems to
have changed significantly in those years.
We *did* introduce some breaking changes though, using the "use strict" header
at the top of files. Would it not make sense to introduce new breaking changes
under a similar header for each change we suggest? For example, "use es7"
could allow people to say they are using the latest features.
Say we create such versioning, it would allow us to improve the language so
much more than we're currently able to, we'd no longer have to stick with
useless error messages for forgetting `async`:
```js
< function u() { let x = await "hi" }
> Uncaught SyntaxError: Unexpected string
// Now...
< "use es7";
< function u() { let x = await "hi" }
> Uncaught SomeError: "await" keyword used outside of async function
```_______________________________________________
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