What I've always wished existed for social media was something more along the lines of a protocol (like email or rss) than a platform (like Facebook or Twitter).
It seems like as long as a communication form is tied in to one specific provider by design, then there is always going to be unsolvable problems with deplatforming users, content moderation etc.
That's what I'd love to see- decentralization in the sense of anyone can feasibly host a server, rather than the web 3.0 / cryptosphere sense. I genuinely think that would solve most of the issues we see from monopoly platforms.