Someone finally implementing full replication / migration / domain virtualisation, that will. atm, there are other things more pressing for the dev team, though. (Anyone here who could fund such major development?)
Btw. i think more likely than big instances being abandoned by their owners (instead of transferring to a new owner), is them being taken down by some law enforcement or legal procedure. Liability costs can make any not-for-profit endeavour vulnerable to bad big player attack.