Comfort and Convenience
Seating preference varies because people do. Height, leg length and how someone likes to hold the wheel all change what counts as a natural position, so one setting rarely suits two drivers equally.
Safety and Driver Assistance
Before setting off is the easiest time to learn where things are. Finding the hazard switch, demister and wiper controls while parked leaves one less unfamiliar task later, when conditions change and attention is already occupied.
Multimedia and Connectivity
Charging and listening are separate needs. A phone can run low on a long drive whatever is playing through the speakers, so it helps to know which sockets or pads, if any, keep it topped up.