Not a solution. Defeats the point of decentralisation, putting most (like 90%+) users in one instance. Big instance is sold to Venture Capital Firm because a bunch of amateur moderators call moderate the whole of twitter… and just like that enshitification shall commence.
No it’s not. If a single server holds a critical amount of the fediverse’s content, they can enshitify.
The reason why the fediverse is resilient to enshitification is due to the fact that it makes migration less painful: If you want to abandon Xitter, which is centralized, you will be unable to access Xitter’s content, which is why it took so long for people to abandon it; but if you want to abandon… let’s say… mastodon.world, you can just make an account on another instance and still access the same content. For enshitification to occur, user’s must be locked in, the federation stops that.
However, this system has one major vulnerability which can completely subvert the fediverse’s ability to resist enshitification: centralization of content. If one instance holds a critical amount of content, they can pull up the drawbridge, that is, de-federate from all other instances. You might think this would upset the users, but it wouldn’t. Most wouldn’t know what federation is, all of mainstream is on the default instance, only the computer nerds are on other instances, so if suddenly, the default instance de-federated from everyone else, and thus becomeing a walled garden just like Xitter, few would notice and fewer would care. And now the default instance is centralized just like Xitter and the enshitification cycle repeats.
If you want an example of this look no further than Gmail. More or less 95% all emails are Gmail. If Gmail de-federates from your instance, you are removed; that means Google can basically dictate what other instances are and aren’t allowed to do. If you do something Gmail doesn’t like, they can de-federate and you instance is now basically useless, since you can’t email 95% of people. Gmail could easily kill Proton Mail by de-federating.