- when you need to re-pair Bluetooth
- when you forget the cable to charge and you need to drive
- when you want to share your car to someone and they need to spend 5 minutes to accept every single ToS possible to simply put a GPS
- several people with phones paired before, now you dealing with complete random
you name it.
- you listen music and you need to go out to buy something while others in the car
None of these problems exist if you have a decent, dedicated computer in the car that just works, it knows profiles, it does need you to be always on wire, or on the line.