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.
Lemmy UI is very easy to use, and fast too. Also, I like the concept of federation (though I have no plan in hosting one) and the fact that the community has been very welcoming so far also help with me being able to enjoy browsing Lemmy.
Of course, there's the obvious problem of lack of content but if the subreddits that I usually lurked on have fully switched to Lemmy then I would have 0 issues with fully switching to Lemmy regardless of the lack of content.