Comfort and Convenience
During a stop-start wait at lights, how much airflow people want from open windows versus still air differs, because clothing and weather habits are not the same.
Safety and Driver Assistance
Time spent with the indicator, horn, and parking brake before moving off a quiet side street means those actions do not have to be hunted for once the journey has started.
Multimedia and Connectivity
People often want a podcast on the way to an evening class; if audio playback is available, that listening task stays separate from placing a call or charging a handset.