Comfort and Convenience
Preferred seating position is a common example: some drivers sit upright and close, others further back. Body proportions and long-standing habit differ from person to person, so a setting that suits one occupant rarely suits another unchanged.
Safety and Driver Assistance
Learning where the basic controls sit while the car is stationary means fewer moments spent searching later. Wipers, lights and demisting are the usual candidates, and knowing them in advance keeps attention where the driver intends it.
Multimedia and Connectivity
Keeping a phone charged on longer trips is an ordinary need in itself, separate from calls or music. Where a suitable power outlet or cable is available, the routine is simply plugging in before setting off.