The core difference being that in one the driver has control over the vehicle — so if he fucks up, he is at fault — in the other he has no control.
THIS is what self-driving cars are (and why people hate them):
I've recently looked over this, and as long as you have IOMMU and set it up correctly it should be possible to get 95%+ performance on pass-through.
Here's one guide, plenty more on the internet: https://bufferoverflow.io/gpu-passthrough/
Most likely because they have no understanding of the original System Shock (I even managed to fuck up and call it an RPFPS, when I meant RPA or "Roleplaying Action" — FPS is so closely tied to action these days), merely trying to capitalise on nostalgia.
Anyone remember Syndicate? While I...