Comfort and Convenience
Temperature is the classic point of disagreement: the same setting reads as pleasant to one person and stuffy to another. Clothing, seating position and sunlight all shift how warm a given passenger feels.
Safety and Driver Assistance
Sorting out mirrors, seat position and the lighting switches before setting off is simply preparation: it takes a moment when parked and avoids doing it later with passengers and traffic around.
Multimedia and Connectivity
Keeping a phone charged is its own need, separate from calls or music. On a longer trip a passenger navigating or streaming drains a battery quickly, so any available power source earns its place.