Not a lot of options there. You either go with an old pre-computer car or get an open source car (which isn’t really an option).

I’m not talking about the infotainment system, just to be clear. I’m talking about the software that controls the functions of the drive and safety systems. If you want an infotainment system that you have complete control over, I’d suggest putting an open source tablet on your dash

https://itsfoss.com/linux-tablets/

Sadly, it looks like most of the FOSS car infotainment projects died a few years ago.

So an optional update rather than one you have to do because of a recall, the thing we’re talking about? Because otherwise this seems like a “technically” sort of gotcha.