Re: "What will it take for Amazon et al to create their own, secure CPU?"
Or, since legacy stuff tends to be on the old side of things, enclose them in a virtual envirenment running in a safe sandbox on the fancypantsy new hardware.
Or, since legacy stuff tends to be on the old side of things, enclose them in a virtual envirenment running in a safe sandbox on the fancypantsy new hardware.