Comfort and Convenience
Preferred seating posture is one example: some people sit upright and close to the wheel, others further back and more reclined. Height, leg length and long-standing habit all pull that choice in different directions.
Safety and Driver Assistance
Learning where the lights, wipers and demister controls sit before setting off is simple preparation. Doing it while parked means an unfamiliar switch does not have to be found in rain or fading light.
Multimedia and Connectivity
Keeping a phone charged on a long drive is its own need, separate from calls or music. If a suitable power outlet is within reach of the seat, a cable stays out of the way.