For me to fully drop google someone needs to create something compatible with Android Auto in my car, it doesn't sound like a big deal but that's a big enough thing for me to need it now.
What's your main use case? Maps?
Buy a separate tablet and a roll of duct tape. If you're careful, you can completely cover whatever obsolete nonsense is built into the car.
Standalone Garmin for nav and Bluetooth for music is all anyone should need.