GPU is bad at many tasks, has no direct access to disk, way less memory, you would have to build cpu in, and add interfaces to network, disk, sound, input devic

GPU is bad at many tasks, has no direct access to disk, way less memory, you would have to build cpu in, and add interfaces to network, disk, sound, input devices. And why? The tech is already factored even between engines - libraries exist. The part of engine that benefit from being on GPU is uploaded there already just not in factory,but when you start a game, so it is customizable, so you can run new engine on old card.