I don’t know… as long as you have corporate social media, I’m thinking most people will remain there out of convenience, precedent, and buy-in. Which would leave places like the Fediverse small fry that probably wouldn’t be going after statistically. Also, the decentralised aspect means that you’d have to get much closer to a 1984 situation for this to be a serious concern, with instances currently spread out all over the world.

But yeah, I agree that “1984” is certainly on the near-horizon of strong possibileries.