Android Auto is an incredibly convenient way to use the apps from your phone in your car. Android Auto works perfectly right (when it connects), but that doesn't mean it's the most convenient it can ...
Google will soon make it possible for video apps on Android Automotive to switch between video and audio modes when the car is in motion, right as Google plans to bring video apps to Android Auto.
Android Auto, as a framework, is designed to link your Android phone to your car's infotainment systems in a manner more convenient and comprehensive than simply connecting to a stereo with Bluetooth.