Ah right. There's no read-only hardware registers that ID product & supported features? Said hw registers non-moddable by firmware? If such hw registers don't

Ah right. There's no read-only hardware registers that ID product & supported features? Said hw registers non-moddable by firmware? If such hw registers don't exist, why not? If they do exist, what's the problem with firmware claiming support for x, y or z when the hardware says otherwise? The market will weed out shady sellers soon enough.