Comfort and Convenience
Airflow direction is a genuinely personal preference. Some people want air reaching the face, while others find that unpleasant and would rather it run low or across the glass; clothing and habit explain much of the split.
Safety and Driver Assistance
Driving any car for the first time is easier after a stationary walkthrough of the indicator stalk, hazard switch, parking brake and window controls. Preparation of this kind is simply about removing guesswork before setting off.
Multimedia and Connectivity
Calls are the common case during errands. If hands-free calling is set up, the phone can stay where it is; where such a function is absent, the sensible habit is letting calls wait until the car is parked.