The thing that I think makes lemmy more valuable than mastodon is the focus on content versus personality. With Twitter, you followed people because you were interested in what they had to say and share. With Reddit, you followed communities. So even if a lot of the people don’t move over, once enough of the community does, it’ll feel the same (or better). I was never super active in my various subreddits (although I did comment, I just never posted), but I’m making an effort to comment and vote a lot on here just to help build that sense of community