Comfort and Convenience
Seating preferences differ because people vary in height, build and how far they prefer to lean back; the position that suits one driver can feel cramped or distant to another.
Safety and Driver Assistance
Finding the wiper, light and mirror controls while parked means you are not searching for them later. A few minutes with the handbook covers the switches that vary most between cars.
Multimedia and Connectivity
Keeping a phone charged on a long drive is a separate matter from playing music through the speakers; a cable may do both at once, while wireless audio leaves the battery draining.