Related, but my prediction is that by the end of the decade internet anonymity will be gone forever. Social will be the first place it falls with governments requiring SSO to a government run IdP that is verified by ID
End of anonymity and end of large scale unfiltered user-generated content. The internet is going to become like every other form of information media where a tiny group of people/companies is publishing and the rest of us are consuming, no questions asked.
It's not impossible, but that's a lot of tech for the fed to setup and they aren't the best at consumer level software. There's also the fact that many political players utilize the anonymity of the internet in their campaign tactics. Not to mention the possibility of connecting to a VPN to circumvent the requirement for using a US ID.
I think it's more likely to see intelligence agencies insist on more direct control over stopping "viral" spread of "disinformation", and to at least threaten to hold platforms responsible.