If you just want to look at and respond to anything there is enough people. If you want to find specific, niche communities then it's still pretty small.
Addendum: Yes we know that you think ml/hexbear/grad are tankies and or .world are a bunch of liberals but it gets old quickly. Try and come up with new material.
This is not the place to start flamewars between Lemmy, Mbin and Piefed.
If you just want to look at and respond to anything there is enough people. If you want to find specific, niche communities then it's still pretty small.