If Lemmy and Mastodon continues to get popular, we will eventually get Instance wars.
If the descentralization of social networks continue, we will have to prepare for the eventual rise of the instances wars, where people will start to fight about which instance is better and which one is weird to be in and so on, but that's for the future of us all.
I think it would be better if everybody selfhosted a instance of their own. Make it super hard and complicated to find communities but, keep things nice and clean