Yeah on the whole it could be good, In the same way that it isn’t a problem that google owns the most popular e-mail service, that doesn’t hurt those on proton mail or any other mail service, and in fact offers benefits that they can just as easilly e-mail their friends using gmail from their preffered mail service. The real fear is the embrace extend extinguish. IE if meta encourages people to join their instance, then gradually makes things incompatible after major communities move to them, but they can’t prevent us from moving back just the same even if they somehow got us to jump there.