Honestly, I haven't noticed a difference on reddit yet, community and content wise. I've been dipping my toe into migrating as I've seen two of the subreddits I'm part of setup on alternate fediverse instances (lemm.ee and sffa). So far, it's been rather disappointing though.
The federation hasn't seemed to work well on either platform, so this is the third account I've had to make in order to participate in a discussion.
I use straight up reddit on my desktop computer, I don't access it from my phone except in extremely rare circumstances, so the changes for third party apps don't really affect me. Part of me wants to show solidarity, but if I'm not going to get a remotely comparable experience, then I don't really have an incentive to quit Reddit. Many of the subreddits I'm interested in haven't made any migration that I'm aware of, and I didn't see substitutions for them in SFFA