My Tesla's lack of Android Auto is one of its biggest drawbacks. Even for navigation it is bad, as I'm forced to use the inferior Tesla map app (which unlike say Waze can't compute directions considering carpool lanes). You also end up with a lack of synchronized directions history to your phone.

IMO, the only upside to the customer is avoiding plugging a phone in. The phone experience is otherwise generally better across the board.

(On a latter note, I consider the Tesla UI good for a car, but bad overall. Climate app also generally sucks).