infotainment systems should absolutely not be sharing core vehicle functionality

Particularly and especially when the infotainment system has an always-on cellular connection. Wired ran a story way back in 2015 that hackers had managed to gain control of (I wanna say) a Dodge (it was a Stellantis group car, can’t recall which one specifically) and were able to control not only convenience features of the car like lights, wipers, and stereo, but to disable the transmission completely. All it takes is one flaw or zero-day.