I think it's a nice idea OUTSIDE the vehicle.
But some car manufacturers are idiots (no other word) and add sounds INSIDE the vehicle.
The Nissan Leaf has tons of gratuitous sounds that cheapen the car.
When you turn the car on and off, they have startup and shutdown sounds like a cheap canon camera.
And they have a "futuristic" driving motor sound, which is probably damaging some of your hearing frequencies on long drives.