Comfort and Convenience
Preferred cabin temperature varies widely. One passenger wants airflow straight at the face, another finds the same setting too cold, and clothing, time of day and personal sensitivity all pull the choice in different directions.
Safety and Driver Assistance
Preparation is simplest when the car is stationary: seat and mirrors set, and the main stalks and switches tried once. Knowing where something sits removes the need to search for it mid-journey.
Multimedia and Connectivity
Calls arriving mid-journey are the common case. Where hands-free telephony is supported, the conversation runs through the car's speakers rather than a handset, so the phone stays stowed rather than in hand.