I dont get why you're downvoted.

Social media should be treated as disposable. Anything that is not yours (as in, is hosted by someone else - for free) should be disposable. In fact id even argue that any media should be treated as disposable. You wouldn't hoard all the material things your accumulate in life, why would you hoard random tweets, comments and reactions forever?

If its worth it, surely you'll find a way to keep it in a way that doesnt demand a third party to do it for you for eternity, no?

"Switching costs" man... people move between countries with vastly different languages and cultures and they adapt, make new relationships, refresh ideas. Is switching from database A to database B that difficult really?