I currently have a Subaru, which almost gets it right. It does switch me over to radio, but if you set it to the Sirius "unit id" channel it is at least silent

I currently have a Subaru, which almost gets it right. It does switch me over to radio, but if you set it to the Sirius "unit id" channel it is at least silent while you fix it, and really you press one button (the "media" button that is a physical button) and everything works again. Bluetooth is spotty, so I mostly use a USB cable. Ford Sync, on the other hand, once it decides that it is trying to connect to bluetooth, will often completely lock up the system for minutes while it tries unsuccessfully to make things work, and then you have to navigate through their UI to get back to a good state, which means that if it decides to glitch while you're driving, you're just out of luck. If you have a little bit of luck your phone will just play the driving directions out of its internal speaker.