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.
It will definitely is a hard to find hard to grow. So far federation and different instances might make redundant communities, but I think these will naturally tend to merge/go inactive in time.
This browser of communities https://browse.feddit.de/ is a godsend to find communities I may like. Though it’s all centered in Lemmy and I want a similar tool for kbin (or this browser to add kbin instances communities).