I probably spend just as much time on lemmy/kbin as I did on Reddit. The biggest difference is most of my time then was based on consuming content and fishing for any kind of interaction and approval I could. Here I feel like I spend most of my time creating, and interacting with other users who are invested in helping the fediverse grow.
There are definitely less active moments here, but those are the times I usually try to fill in the void with my own content, give someone's community or post a boost so that they see more interaction, and engage in one of the discussions being had in the threads of more active posts.
Plus whenever I'm starved for content, I go over to new, upvote posts as I go, and I usually find something interesting.