Generally, you do not need multiple accounts on different lemmy servers. You can “use” the other servers with one account. And, that you have multiple different servers, is by design.

Or are you referring to defederation, when you are writing about “seperation”?

Maybe Lemmy won’t be the right fit in the longer run, although development seems pretty good currently.

Whats more important to me is, how the adoption of ActivityPub evolves and the Fediverse developes in the long run.