@functionalscript
For me it’s mostly about avoiding lock-in. And the Fediverse does that well enough (for my taste). Hopefully, it’ll eventually support domains or URLs as user handles. Which shouldn’t be too difficult(?)
But there is definitely room for something even more decentralized—especially for people who have a high risk of being censored such as dissidents of totalitarian regimes. Such a solution will have different pros and different cons.