> In terms of social data, users don’t really have a major issue with the status quo

That's exactly it. And with social media (unlike files and photo storage) migration isn't really something people care about, because it's about the present not the past.

If you move from Twitter to Bluesky, does anyone care about moving their tweet history? They just want their list of followers to migrate over as much as possible, which happens relatively organically anyways.