No android auto? What are you basing this on? I ask because I am responding from grapheneos while connected to android auto, and I am concerned I am in the wrong universe again.
In any case, it is a fantastic OS with many of the annoyances of Android removed. (Scoped file permissions are fantastic, for example) If you are on the fence, I'd suggest giving it a shot. Replacing a phone OS might seem scary, but it is really pretty similar to use.