>
> If capacity grows, fewer individuals would be able to run full nodes.
>
Hardly. Nobody is currently exhausting the CPU capacity of even a normal
computer currently and even if we did a 20x increase in load overnight,
that still wouldn't even warm up most machines good enough to be always on.
The reasons full nodes are unpopular to run seem to be:
1. Uncontrollable bandwidth usage from sending people the chain
2. People don't run them all the time, then don't want to wait for them to
catch up
The first can be fixed with better code (you can already easily opt out of
uploading the chain, it's just not as fine-grained as desirable), and the
second is fundamental to what full nodes do and how people work. For
merchants, who are the most important demographic we want to be using full
nodes, they can just keep it running all the time. No biggie.
> Therefore miners and other full nodes would depend on
> it, which is rather critical as those nodes grow closer to data-center
> proportions.
>
This meme about datacenter-sized nodes has to die. The Bitcoin wiki is down
right now, but I showed years ago that you could keep up with VISA on a
single well specced server with today's technology. Only people living in a
dreamworld think that Bitcoin might actually have to match that level of
transaction demand with today's hardware. As noted previously, "too many
users" is simply not a problem Bitcoin has .... and may never have!
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