Comfort and Convenience
Cabin temperature is a common point of disagreement, because people differ in build, clothing and where they sit relative to the vents. Agreeing on a setting early, or directing airflow away from someone, usually settles it.
Safety and Driver Assistance
Spending a moment with lights, wipers, mirrors and hazard switches before setting off means you are not searching for them later. Passengers also benefit when the driver's attention can stay on the road ahead.
Multimedia and Connectivity
Phone batteries drain quickly on longer trips, so a charging point matters to whoever is navigating. If a car offers one, passengers can share it; calls and music are separate questions handled by other functions.