Comfort and Convenience
Cabin temperature is a common point of disagreement, since passengers differ in clothing and in how quickly they feel a draught. Rear occupants often notice airflow differently from those in front.
Safety and Driver Assistance
Adjusting mirrors and seat position at a standstill takes a moment, whereas doing it in motion divides attention. Preparation of this kind belongs before the journey rather than during it.
Multimedia and Connectivity
Hands-free calling matters mainly because it keeps a conversation from occupying a hand. Where such a function is available, it works through the car's microphone rather than the phone's own speaker.