That's a non-starter in most countries. Since the car software is tied into a number of important safety features and regulated controls, custom operating systems will never be supported.
There are already massive problems with people miswiring head units to play videos while driving and updating their ECU to spew pollution into the air. You're not going to convince any significant number of people that it's a good idea to allow arbitrary code to run and control most of the other systems too.
There are already massive problems with people miswiring head units to play videos while driving and updating their ECU to spew pollution into the air. You're not going to convince any significant number of people that it's a good idea to allow arbitrary code to run and control most of the other systems too.