It should be noted that the Tivoization clause in GPLv3 is pretty narrow. It only covers software that you acquire in the same transaction in which you acquire the locked down hardware.
> For embedded systems (like a TiVo or a car) there's no other software being installed.
For now anyway. I would be surprised if cars do not end up with apps. The car will come with the base software installed and then you can later buy apps for your car from an app store run by the car maker.
It also applies only to "“User Product” is either (1) a “consumer product”, which means any tangible personal property which is normally used for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling."
That "narrow" case is the entire case.
I'm currently working on a product for a well-known company and there's a corporate ban on GPLv3. And we do get audited.