Comfort and Convenience
Seating comfort is personal: height, leg length and posture change what feels natural. A position that suits one driver may leave another reaching or sitting too upright, so preferences differ even in the same car.
Safety and Driver Assistance
Learning where the lights, wipers and hazard switch sit is easiest while parked. Doing that first means fewer moments spent searching for a control when attention belongs on the road ahead.
Multimedia and Connectivity
Keeping a phone charged on a long drive is a separate matter from playing music or taking calls through the car; where such functions are available, each may rely on a different cable or setting.