That's such a strange piece of UX. As a typical user, who on average consumes content rather than produces it, what I care about is that my list of followed accounts migrates with me so that my feed stays relatively consistent. As a content producer I would also care about my past posts migrating with me, which they don't. Having followers continue to follow me after migration is only the primary concern for the "influencer". I get that "my friends can still find me" is an important feature but who thought it was ok to skip the other two?