I suspect @Gargron is trying to address the UX problems Mastodon has.
(And there are a lot of UX problems.)
I've been doing a lot of UX testing of various parts of the Fediverse (including Mastodon).
I think @Gargron has definitely (also) noticed one of the UX problems — having to choose a server causes many people to give up and abandon the sign up process.
...
Let me ask you this —