Comfort and Convenience
Preferred cabin temperature differs from person to person, and passengers in the back often feel airflow differently than those in front. Clothing and the time of day change what counts as comfortable.
Safety and Driver Assistance
A few minutes parked is the right time to adjust mirrors and the seat and to find the light and wiper switches, because doing any of this while moving divides attention.
Multimedia and Connectivity
Voice quality on a call depends on microphone placement and background noise, not on the speakers. If the system supports hands-free calling, road and wind noise still affect what the other person hears.