Even if people want to / are allowed to, I'm trying to imagine how well starlink could plausibly function if 2 billion people switched from their sketchy terres

Even if people want to / are allowed to, I'm trying to imagine how well starlink could plausibly function if 2 billion people switched from their sketchy terrestrial service to starlink. As a luxury product used by a few people, maybe it "solves" the problem, but I don't think this is a very scalable solution.