I wouldn't mind having the option of a car's voice assistant (exclusive for the car, where I have a signed contract with the manufacturer stating that what happens in the car stays in the car and doesn't get sold for ads). But I'd still very much prefer to have a dedicated physical button option for any basic function that a driver might use while driving. Not a button that navigates through a menu but something where I can use muscle memory and have the guarantee that it does what I expected without taking my eyes off the road for a second.

So for example the volume up button should always be a volume up button. They shouldn't change function because in some other menu I picked "temperature" instead of "volume".