Comfort and Convenience
Airflow is a common point of difference: one person wants a window cracked open for fresh air, while another finds the draught and the noise unwelcome. Habit and seating position both shape the preference.
Safety and Driver Assistance
Before a long drive it helps to locate the lights, wipers and hazard switch without looking down. Doing that while parked means an unfamiliar control is not being learned for the first time at speed.
Multimedia and Connectivity
Calls are worth planning separately from music. Deciding in advance whether to take them hands-free, let them ring out, or stop somewhere first keeps that decision from being made in moving traffic.