It's not like the computers are all standardized and can be accessed through a $25 device. They have complete control and car guys won't find a way around it pretty easily.
Only the diagnostics are standardized. If you want to tune or perform coding you would have to reverse engineer the computers/bypass any applicable DRM(like certain infotainment features in VW cars like CarPlay have DRM checks to see if an volkswagen stealership activated it)
It's not like the computers are all standardized and can be accessed through a $25 device. They have complete control and car guys won't find a way around it pretty easily.
Only the diagnostics are standardized. If you want to tune or perform coding you would have to reverse engineer the computers/bypass any applicable DRM(like certain infotainment features in VW cars like CarPlay have DRM checks to see if an volkswagen stealership activated it)