tomshardware has power consumption+efficiency charts
should be easy enough to avoid by just not buying computers with that processor
Intel ME / AMD PSP are similar things already on CPUs today, and because pretty much all x86 CPUs have it, it’s very hard to avoid it. They’re basically builtin Intel/AMD spyware and the only way you can get rid of them is by using something like Coreboot, which has very limited availability
because you need the coreboot people to write firmware that can initialise the system, and that probably takes a lot of reverse engineering
I don’t know much about this, but I assume there’s little to no effort for corebooting on the amd side, I’ve only seen intel platforms with coreboot