Almost on point. Facebook has ingrained itself into socio-individual behaviour schemas. Social medias are likely here to stay for a long time and I don't see a company treating it's users as 'human beings' not 'commodities' being a front-runner to win a hypothethical future social media companies race; there are just no areas left that any rival company could simultaneously 1) exploit to stay profitable 2) make people use it.
There will likely be some decentralized services but that's all.