Most of those don’t completely turn it off. It’s only a reduction in limitation. To truly turn the system off I think you need to cycle the key five times, pump the brake pedal three times, leap through a flaming hoop, sacrifice a ram, chant to the Goddess of Spring… you get my point, it’s ridiculous. If I were to ever design a car it would be a toggle switch. On or off, nothing more complicated than that.