And activity is rising as far as I can tell, look at the graphs at the bottom.

I wonder what’s up with that number of servers decline.

Consolidation? Which is fine to that extent.

I’d wager many experimented with hosting a younger Lemmy, and hosts who couldn’t sustain it got shaken out over time.

I wouldn’t assume the rise in posts/comments is all bots, either. I don’t have anyone blocked, and it doesn’t feel overrun to me.