This is often because in-car tech is terrible. The user interfaces often seem to be reminiscent of something knocked together for Windows CE in the mid 90s, they are often awkward and laggy and counterintuitive. And basically they are ossified to the car's manufacture date, and you have to pay through the nose for data updates. When I last changed my car, the car was 18 years old - would an in-car satnav/other tech still be supported 18 years after it came out?
All I want in a car today is this: some USB charging ports, some point on the vehicle interior that allows you to attach a tablet or phone holder, and a decent Bluetooth implementation. It's far easier to update my phone or tablet than anything actually built into a car, and I can also take it with me and use it in a rental vehicle, on my bicycle, in my house etc.