I mean it is different from reddit in that now instead of 1 server with arbitrarily divided communities, now you have as many as are popular and it is more visible because there isn't enough content. If there are tons of users are all in one place it might make sense for something like /r/bees , but here I think it'd be better served with a tag like #bees for all instances ( ̶t̶h̶o̶u̶g̶h̶ ̶m̶a̶y̶b̶e̶ ̶s̶o̶m̶e̶t̶h̶i̶n̶g̶ ̶d̶i̶f̶f̶e̶r̶e̶n̶t̶ ̶f̶o̶r̶ ̶s̶e̶r̶i̶o̶u̶s̶ ̶b̶e̶e̶ ̶d̶i̶s̶c̶u̶s̶s̶i̶o̶n̶/̶m̶e̶d̶i̶a̶ more serious than I thought, but you'd need to bookmark that tag unless there are other features I'm unaware of). Whereas beekeeping does make more sense as a community.

I could also see it being interesting for unified communities. It would be mostly the same as now in most ways except posts would be visible from all instances (if federation is on and that community is not blocked). Mods would moderate their own instance (and nothing would stop users from posting to a different instance of the community if they so choose) though limited mod sharing could be a thing. So really it's just something to make things less annoying than subbing to 3+ communities (hopefully with link/story merging too as my first comment mentions).

Also with divided communities in mind, why not make posting to multiple communities in one go (tied together thus not cluttering new, and possibly allowing community-specific versions) a thing?