Same for me. I browsed Reddit exclusively for a bunch of small but active communities about books and niche games or shows. Most of those either don't have a place on Lemmy, or the place they have is a ghost town. Too little posts, and even fewer engagement. I frequently see posts with upvotes in the single digits and zero comments.

I don't plan on going back to Reddit, but at the same time I don't think that Lemmy is a valid substitute yet. Maybe it's also a problem of discoverability? Like, I heard of Lemmy during the APIcalypse, but I've never seen it mentioned anywhere else, and I don't know how a normal person looking for a community online is supposed to find Lemmy, or even learn the existence of it.