… what should we do?
I guess it all depends on how it would be implemented, which is something I have a hard time imagining at this moment.
How do you imagine day to day online life in a post-Chat Control EU world? Which ways of communicating would still be private? Is there anything we can do at this point to prepare for the worst outcome?
Briar is the messaging app I would switch to. It was designed for protesters. No central servers, peer-to-peer, defaults to sending messages through tor, it can also send using wifi, data, or bluetooth.