What would a nationalized, public version of Twitter even look like? Every citizen is granted and guaranteed the right to spew their vitriol publicly where ever

What would a nationalized, public version of Twitter even look like? Every citizen is granted and guaranteed the right to spew their vitriol publicly where everyone can see it? I agree with you about ISPs, but I don't see the sense in the argument that I keep seeing about designating social media as a utility or public good. What would that even mean? Twitter continues to shore up ill will from all sides of the political spectrum. Mastodon, Matrix, and other decentralized, federated communication platforms are increasingly in a good position to put themselves forward as the actual solution to this problem.