I feel like any cases of multiple communities for a given subject will naturally resolve as users develop a preference for one community over the other. The users from the lesser communities will organically migrate to the dominant community for that subject, or we’ll arrive at the conclusion that each community actually explores niches of that topic that are worthy of separation or delineation.

That’s how it worked on reddit, anyway. Multireddit functionality of any sort was missing on most platforms, and yeah there’s a lot of users that want it. But a lot of that desire is borne from the current state of Lemmy, rather than what it will be once the fediverse is more developed both as a concept in software and a concept in social media interaction