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.
The platform is fine and being able to subscribe across Lemmy instances is nice (i.e. I'm not even on Beehaw but here I am anyway) - it just needs more users and content.
The main issue is going to be getting that critical mass of users, especially on a platform that isn't quite as straightforward as a centralized one. Trying to explain how Lemmy works to my wife just left her confused and wondering what the point was. Getting people like her to make the jump to a federated platform is going to take time, effort, and - most importantly - content.
Do we need to get everyone here? My dream would be to find a community of people who can communicate in a civil way and offer ideas that are interesting. We are getting there quite fast already.
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)