Earlier quoted context omitted.
Exactly this whole discussion hinges on the idea that modern vehicle interfaces are somehow "fancy". Touchscreens, ARM boards running Linux, CMOS camera sensors, and drive-by-wire (heck Tesla is even adopting Ethernet) are totally commoditized. They were fancy 30 years ago, but today they are the boring cheap option. It's pure nostalgia.
The nostalgia is understandably for fully user transparent, user controlled, "home" repairable cars .. which is understandable and a goal I'd like to see in EV's. Open source code, no phone home or hidden backdoors, optionally no wireless or external connectivity other than by on board physical port, etc. Cars of yore have car manuals, manifolds and heads can be replaced with official parts or scrap yard parts or thi…
No, most cars of yore only had manuals available to dealership technicians, and no one else. Genuine manufacturer-made manuals were difficult or impossible to find.
Everyone else bought Haynes or Chilton "manuals" which were really done by reverse-engineering.