I can't edit anymore, but I meant physical controls in fixed positions, so you can feel which control you're interacting with in relation to other controls. Even better with a little bump or divot, like the "5" key on a 10-key.

With a touchscreen, there's really no way to know where your starting point is when you reach for it blindly, so you have to look. I suppose you could use the edges, but that wouldn't be so easy on a large touchscreen.

With an old car radio, you can reach for it, know what you touch first, and know where everything else is in relation to it, all without looking, ever.