Comfort and Convenience
Seating position is a good example: height, leg length and posture all differ, so two people rarely settle the same way. Preferences also shift with the kind of driving each person usually does.
Safety and Driver Assistance
Learning where the essential switches sit before setting off is simply sensible preparation, especially in an unfamiliar car. Wipers, lights and demisting are easier to find calmly at a standstill than in changing weather.
Multimedia and Connectivity
Keeping a phone charged on longer drives matters to many people, since navigation drains a battery steadily. Where charging is available, it is worth checking that the arrangement suits how you carry your phone.