How many millions of users does it have? How many posts? How active are they?
Remember when forums would be super active with, like, 500 users?
“Millions of users” is a vanity stat. The critical mass needed to keep a discussion group alive is actually quite small – assuming you’re interested in, you know, discussing things. So, how active “Lemmy” is is entirely dependent on which topics you’re interested in.
There is a point where a forum is too active and you need to either split it or implement weird and complex rules so things don’t get too large.
Hasn’t Lemmy sort of already accomplished that both with federated servers and communities?