I run a few groups, like @fediversenews@venera.social, mostly on Friendica. It’s okay, but Friendica resembles Facebook Groups more than Reddit. I also like the moderation options that Lemmy has.
Currently, I’m testing jerboa, which is an Android client for Lemmy. It’s in alpha, has a few hiccups, but it’s coming along nicely.
Personally, I hope the #RedditMigration spurs adoption of more Fediverse server software. And I hope Mastodon users continue to interact with Lemmy and Kbin.
All that said, as a mod of a Reddit community (r/Sizz) I somewhat regret giving Reddit all that content. They have nerve charging so much for API access!
Hopefully, we can build a better version of social media that focuses on protocols, not platforms.
Sure, we don’t need the masses that reddit has and it would be great if mostly people with a similar value system would join. But I certainly would welcome more users and especially more content. I liked reddit for specific communities related to mental health, gender identity/sexuality and neurodiversity. There is (still) hardly any activity in this regard on Lemmy instances. I really hope that more people join to build communities revolving around these topics. They don’t have to be super large though.
ETA: if you search for e.g. “trans” within the instances you get various results ;) (the one I was referring to is called “Trans Memes for Trans People@lemmy.ml” I think)