@Spaxe Best way to implement this, IMO:
1. Create account A on Server A
2. Create account B on Server B
3. Authenticate account A to Account B
4. Using a signature, grant permission to migrate contacts and posts
5. As long as both accounts are open and connected, one can serve as a relay for the other.
6. Your contacts get redirected to your new "main" account when trying to visit your old one.
In #Hubzilla, this concept is called "Nomadic Identity", and it's awesome.
@Spaxe It probably doesn't, it's a fairly young project, and conceptually Nomadic Identity requires several pieces to actually work well.
Never say never, though. 🙂