When a question is migrated, and the author is nowhere to be found on the new site, how exactly can anybody be awarded for providing the most up-voted answer? (Whether they answered before or after the migration is irrelevant.) Well, besides getting the votes for providing a good answer. Is there currently any method of accepting a "correct answer" for questions that underwent migration?
Would it be reasonable to automatically accept the highest-voted answer 48 hours after migration?