[nqi]

OEMs won't mainline their drivers with all their trade secrets. That's impractical, unrealistic wishful thinking that harms consumers.

[wtallis]

The drivers aren't where the important trade secrets are. Those are all in the hardware or in the proprietary firmware that the driver has to upload to the hardware, or in a userspace blob as with AMD's GPU drivers. The code that actually runs in the kernel on the host CPU doesn't reveal any valuable IP given the way most hardware is designed these days.