I also like the beehaw has a mission for community in mind, supported by having an application process; and their having prepared umbrella communities that will prevent echo chambers.
Beehaw is definitely getting hammered too though; it’s probably the second- or third-largest instance atm.
The reason reddit had so many is that it would rapidly homogenise into giant echo chambers with minimal community. Minority perspectives were supressed or drowned out by lurker voting.
New subs were being made to recapture giant subs’ original intentions, or specialise, yo put minority perspectives of the Hot page and curate a community as a result.
Lemmy isn’t big enough to homogenise like that, at least not yet.