Seriously? I'm 90% sure this will NOT reach Lambo times in Nordschleife. And as a sports car, it will 100% not be fun to drive, weight is everything in a quick small car for fun.
Regarding gaming - Linux went backwards now that new gadgets like VR headsets and high refresh synced monitors are required for serious gaming. Feels like 2002 all over again without any games.
Well, there would be another kind of consequences. See Android, where there are proprietary drivers and most of them are buggy crap thrown over the wall.
There is also a reason, why Apple won't ship hardware or drivers, that they don't have source for.
I'm not sure "Linux" (by this I believe you mean Linux kernel and distros & open-source software) is hostile to the concept of proprietary drivers. There is only a small subset of users who are hostile to proprietary drivers. And I have no idea why you are suggesting Linux doesn't have a stable ABI.
Because for drivers, it doesn't and never did and never will as long as Linus has anything to say about it. This is in stark contrast to his position on userland ABI, which is so stable you can still run Motif.
Site's not ready for 21st century.