Comfort and Convenience
Cabin temperature is the classic point of disagreement: what one person finds pleasant, another finds stuffy or draughty. Clothing, build and where someone sits relative to the vents and the glass all change how a seat feels.
Safety and Driver Assistance
Sorting out mirrors, seat position, lights and demisting before setting off is simply easier while stationary. Time spent learning where each function sits is time not spent searching for it with passengers aboard and traffic moving.
Multimedia and Connectivity
Phone battery is the everyday concern on longer trips, as navigation drains it fastest. Where charging is available, a passenger can keep the route running; calls and music are separate matters, handled through whatever audio functions are present.