What's interesting, if not scary as hell, is how we tend to compartmentalize our digital identities.
Even the biggest Taylor Swift fan with 100k twitter followers has a "normal" account. And we tend to bounce from account to account, app to app, when we play on our phones. Right now, those borders are clearly defined.
But in a world where Meta is a social cloud service, you could hop apps all day and never land on a ByteDance platform (or whatever).