I already self host my own matrix server. Everybody can’t do that, but everybody can use someone’s matrix server. They can’t shut it down because it’s decentralised and federated. It would theoretically be illegal to use but I don’t see how they would be able to stop it.

Email with PGP would then also be illegal but impossible to effectively stop. That’s why the whole discussion is so stupid. It only hurts the normies. Criminals and tech savvy people will find a way around it and still use encryption without mandated backdoors.