This is a great example of why it's terrible to have a car that can be remote controlled including the ability to push arbitrary updates. It should not be possible to use XSS to compromise a vehicle.
But we're living in a world where there are still people running unpatched Windows XP boxes still vulnerable to MS08-067.
If it weren't for Windows automatically installing updates, I imagine at least half of home users would still be vulnerable to Eternal Blue.