Things can only go downhill from here, and it's hard to imagine how things could get any better. I mean, I can only hope Google will change their minds and see sense here.

I think people underestimate just how bad this will become. First they will use Remote Attestation against users. Not only will your certified device not run unsigned apps, your uncertified device won't run certified apps (already happening [0]) Than more and more services will require you to own a google certified device. Banks, Governments, Insurance, Postal Service, everyone. (see also [0] for examples)

Soon you'll live in a world where you are forced to own and regularly use a device certified and controlled by either Google, Apple or Microsoft without exception and no way around it.

[0] https://grapheneos.org/articles/attestation-compatibility-gu...