I wouldn’t call the fediverse particularly “small”, there are over 1000 Lemmy instances, with the total fediverse clocking at over 3 million active users (around 12 million accounts), and while the interactions on the different projects are not all the same, I think there is a lot of options to choose from.

And technically… Lemmy doesn’t support much of it (yet), but all projects can interact with each other.

Some tools may be still missing, but I think it should be possible to find a comfy place for everyone.