Comfort and Convenience
Preferred cabin temperature is a familiar point of disagreement: passengers frequently want warmer or cooler air than the driver. Clothing, build and plain habit all feed into where someone chooses to set it.
Safety and Driver Assistance
A few minutes spent locating the lights, wipers and mirror adjustment before setting off saves unfamiliar searching later. Preparation of this kind is easiest while parked, when nothing else is competing for attention.
Multimedia and Connectivity
Keeping a phone charged matters most on longer trips, particularly when the same phone is handling navigation. Charging remains a separate question from whether calls or music are routed through the car at all.