See above (sorry, should have replied to your post, had I not get confused with the fact that later posts appear above earlier ones).
Ninguem
joined 2 years ago
Quite the opposite...
Usenet was decentralized. Email is decentralized.
That said, I foresee that all of those that now host a shinny mastodon or lemmy instance would not be as many - plain command line, no visuals, boring server stuff is a lot less sexy. But those could just link their instances to a server (they could host themselves as well, of course).
Maybe this is already happening and I fail to recognize it?... How do you host a lemmy instance, for instance? Aren't there "services" supporting your instance?... I honestly don't know.