They will begin so, but the regulation means the authorities can backdoor your device way easier than they can today. It doesn’t mean your custom ROM device will be free of the scanning software forever.

It also means that you need to know that the receiving device you’re communicating with is clean custom ROM device, otherwise your messages will be scanned on the receiving side.

The regulation is a complete shitshow privacy nightmare hiding under CSAM trenchcoat. We’d do well to organize and fight against it, instead of trying to back down to the perceived safety of esoteric custom ROMs.

assuming the baddies don’t already have full access to your phone data

That’s the whole point of Chat Control 2.0

It’s great as long as you can guarantee that the person you’re communicating on the receiving side does the same. Otherwise it’s useless as your messages will be read on the receiving device. In practice it will make private communication extremely cumbersome and niche.

Also, the authorities can backdoor your custom ROM device at will, when seized.

ChatControl 2.0, if passed means your entire device is backdoored so it doesn’t matter what apps you installl, they can get your info pre-encryption