Comfort and Convenience
Cabin temperature is one of the clearest examples of personal preference: the same setting that suits a driver can feel cold to a passenger. Clothing, and simply how warm someone runs, explain much of the gap.
Safety and Driver Assistance
A few minutes in a stationary car, working out mirror adjustment, hazard lights and how the instrument display is read, means those actions need less thought once traffic and unfamiliar roads demand attention.
Multimedia and Connectivity
Navigation and music both draw on a phone's battery, so a charging option matters on a long route. Whether audio reaches the speakers by cable, wireless link or not at all is a separate question.