In fact, the Android Auto/Carplay functionality is largely driven by the software on the phone, the headunit really just acts a dumb terminal when entering that mode.
If anything, this is a WAY more future proof design than the current in-car entertainment and navigation functions which rarely see updates. It is likely that Android/Apple will be around in a few years with regular updates you can take advantage of in your car, vs a navigation system that will never see a change, even a security update.
If the fridge for example, used "Android Fridge" or "Apple Chillplay" it is likely this problem wouldn't exist. An OTA on the phone which pushes the calendar to the fridge would solve this. This is how Android Auto and Apple Carplay work.
First of all, it's in addition to the built-in systems which have AM, FM, SD card reader, HD radio, Sirius XM, navigation, Sirius NavTraffic, local gas prices, sports scores.
Secondly, why would nobody buy older tech?
Third, if the car was worthless because of outdated tech, why would a dealership buy it?
Fourth, even in this day and age, people still upgrade/replace the factory electronics.
This is what I don't think people quite understand.
Same with (Android|Apple)Auto that's coming out. By the time you've paid it off, who is going to buy it?! You'll HAVE to trade it in at the dealership. That limits you in so many ways.