My CX-9 has a combined dial + joystick for navigating the menus / navigation system. It's located on the center console.

I doubt the driver should ever be working that display while driving. But I do find that controller more comfortable than reaching my hand out to the touch-screen display. Maybe that's just a quirk of my physiology.

It's everyone. Same reasons why mice are much less tiring to use than large touchscreens.

Doesn't hurt that mice are furry and adorable.