It is a design issue because you cannot freely change the number, location and size of buttons. Also, buttons need to be planned long before mass production starts, and for smaller series it is quite expensive to have the mold and design created only for a specific car. That's why some buttons in super cars are shitty looking stock buttons.
With touch buttons or touch screens you only need to decide on the screen size and placement and everything can be done later in the development. It is quite an advantage from the car manufacturer's view.
With touch buttons or touch screens you only need to decide on the screen size and placement and everything can be done later in the development. It is quite an advantage from the car manufacturer's view.