I do want to move from the mastodon.social instance to a smaller one. I'm still looking where I want my profile to be hosted.
If mastodon.social gets defederated from the rest of the fediverse for some reason, that would mean that, in my opinion, I could no longer recommend it to anyone not as technologically inclined, which would be disappointing.
Sure, I'd like to spend some time researching servers, researching how transparent their moderation policy is, if I'd like to host my profile on said server, etc., but this seems like a major hurdle for many new users.
Next to that, actually finding out if the server you want to join is, for example, blocking the server your friend is on is either difficult to find or completely impossible.
And sure, maybe the server that the theoretical friend is on could have been defederated for illegal content or hate speech, but how will I figure out whether that's the case or there's some petty internet drama that even I, as terminally online as I am, do not know of?