Most servers do. Even Lemmy.World defederized from those tankie servers.
Imo that’s the beauty of how all of this works. If you’re on Beehaw and don’t like how they’re doing things, you can leave and go to another server without issue. It’s not like Reddit where you’re just sol.
Is there a tool to sync account's community subscription? It takes time to re-subscribe to all the communities of interest so it's not so trivial to migrate instance
https://github.com/wescode/lemmy_migrate calls itself "migrate", but judging from a quick glance at the code it takes one primary account and adds all the subscriptions the primary has, but the secondary doesn't, to any number of secondary accounts.
So it's really a one-directional sync without deleting.
If you were using Apollo you could export a list of your subreddit s and import it to wefwef.app (currently the best client for mobile)
It'll still take you time to migrate over, but in the end it will be worth it. Remember, with Lemmy YOU do the organization - there could be multiple instances with your favorite subreddit, it's up to you to pick what you want.
I’m new to all of this, but my understanding is they defederated with lemmy.world as well. Would this impact them negatively in the long run considering this instance has such a large user base?
Yes and no. It might hurt their potential userbase, but beehaw also is about quality over quantity, and these moves are an effort to enfore that policy.