I contribute far more now. I already have more posts on Lemmy in nine months than I did in all of the 10-ish years I was on Reddit. My rate of commenting is about the same.
I've also changed the way I get my news; I went retro and use RSS feeds now. I do fear there's a risk of over-curation with a minimum of sources leading to narrow viewpoints. Even Reddit's news bubble was more expansive than what I've got coming in. But my feeds and Lemmy's bubble are what I've got for now.