True. That are some Lemmy specifics and I'd like Lemmy to improve. But Lemmy has so many other issues. Moderation tools, UI bugs, missing error messages, you often can't write ampersands because the markdown interpreter is a bit stupid, you can't mute instances... There are currently some 500 issues open for the frontend and 200 more for the backend. There are lots of things to do.

I think moving communities is a bit low priority. Yes, it would be an awesome feature, but rarely needed. Migrating accounts is something I'd definitely like to see implemented. Other federated platforms have this or at least a way to export your account and import it somewhere else. With varying degrees of how well subscriptions are migrated in the process.

The defederation is another issue specific to Lemmy. In my eyes, Lemmy wasn't quite ready for the inrush of people once the Reddit API thing happened. Some moderation features are still missing to this day. People created communities everywhere without intending to use them but just to claim the name and have moderator rights. Admins did some rushed decisions and were a bit trigger-happy with the 'defederation'-button. Security issues surfaced. And the lack of a feature that allows users to block instances or defend themselves against things like brigading, makes it necessary for the admins to step in. And the way Lemmy works, defederation is unnecessarily complicated and has lots of unwanted side-effects like posts and comments being visible to some people but not for others, depending on the triangle of your instance, the instance of the other user and the instance that is home to that community.