That's a good idea, but I think at least part of the reason it's more complicated is that you have to design and fabricate a new face plate for the dashboard, and get a new set of controls every time you want to change something on it. Say you wanted to add a new button on a particular trim level only, because it has a feature that the other levels don't. You'd need to either redesign that whole part of the console for just that trim level, or else sell everyone at a lower trim level a console with an extra button that does nothing. Multiply that by N, for every tiny feature you want to sell on the higher trim levels. If you've got a digital display, of course, you can just go crazy and add all the UI elements (and features) you want.