Sure. Starting price for a car would be several years salary but at least you could abide by GPLv3 licensing should any part manufacturer choose to use it.
then you do not need to make it modifiable under GPLv3. It explicitly states that.
anyways, it's generally not, expect any Linux system in a car to run from flash memory.
I deal with manufacturers and OEMs putting software in cars for a living. I am not speculating, I am just reporting the reasons they tell me they will not accept any GPLv3 software for anything that gets loaded into their target devices.
1. They are lying, and spreading FUD about regulations and licenses as an excuse to hide the real reason why they don't want to let user install their software. (Eg, because options costs extra and if it was free software one could install it for free)
2. Or, they are mistaken and don't understand the license. Maybe the cost to use alternative is less than the cost of figuring out.
3. They are right and that is a sad reality that the government give more power to companies than power to end users for things they owe.
Since you mentioned something about the ROM which was clearly false, that could very well be option 1 or 2.
I mean, why would the gouvernement want to restrict users to update the GPS software or the media player?
In many projects there is the requirement of a fixed release for 3rd party dependencies, versions for which all tests have been checked to pass (this is what is done in NodeJS with packages.json). There is even a requirement of reproducible build sometimes (like with the ongoing project to reach full reproducibility in Debian builds).
Wouldn't these fit the same thinking pattern as the requirements of certification of software for the industry?
I'd love to hear RMS on this subject, maybe he would, too, say that the solution exists inside of GPL3 rather than outside of it.