Eh, it also helps that it's from a recognisable brand that people already understand. Decentralised social networks have a long way to go to meet the elevator-pitch test, as it were.

Not to say that it makes it any less bad, but just that it's at the very least understandable - I can easily see the "average person" saying "I want to leave Twitter" and just picking something is relatively similar, with a single logon page that just works out of the gate.

So much of the systemic problems in the world stem from that sort of mentality

But picking all instance is so hard

I mean actually kinda yes. I'm pretty techy and I spent a few days trying to figure out which one I would use. Ultimately landed on .world because I didn't want to do an interview. Other people might be turned away from that, but maybe it's a good thing.