I'm not sure why I'm saying all this.
I think it's because all the really good stuff in Twitter (@-replies, usable clients) was actually designed and built by users, not Twitter. Twitter, the company, didn't embrace those ideas until very late.
Mastodon and other fediverse remind me of that time, when good ideas could come from anywhere. It's the bottom-up experience that's been missing from the web for years.
We really are somewhere between BBS and Web 1.0
Twitter was good in the beginning, then Twitter the company wrecked themselves with promoted-content, non chronological timelines, content curation, unethical data hording practices, a top-down experience... the list goes on
A Mastodon instance for info/cyber security-minded people.