Comfort and Convenience
On a shared evening trip, one passenger may want more airflow on their face while another prefers still air, because people differ in how they tolerate heat and draughts.
Safety and Driver Assistance
Checking how the indicators, horn and lights work in a quiet driveway before a weekend trip with guests makes later junctions less hurried, because the driver is not learning those actions in traffic.
Multimedia and Connectivity
A parent waiting in a school lay-by may need to take a short call; if the phone is already unmuted and in a stable place, that conversation can start without rummaging through a bag.