I’ve tried Jerboa and Connect. They are ok, but there are features I’d like.
Biggest feature is account backup and transfer. If I switch Lemmy instances, I don’t want to have to sub and block all the same channels and people. Heck, maybe keep two accounts always in sync, just in case my initial instance goes down.
Instance blocking. Basically individual defederation by hiding posts and users in the client.
Blocking all subs of a name regardless of instance. If I don’t want to see a sub about Foo on one instance, I probably don’t want it anywhere.
Keyword blocking. There are public figures I am tired of. Don’t need to see any post about them. (Connect actually has this, although I haven’t tested it yet).
Really easy channel blocking. Just swipe and it’s blocked.
I doubt sync could backup a whole account. Lemmy’s api would need to be able to do that, which it currently doesnt.
Here’s one of multiple issues raised in the lemmy github for user portability: https://github.com/LemmyNet/lemmy/issues/3057
They may choose to split the issue, as it’s about community & user migration, and the former is far more complicated (from what I understand), as explained in paragraph 2 of this comment.
Clients at the very least have a list of all subs. That’d be a minimal but still useful level of migration capability. Blocked subs and users, I don’t know.