Comfort and Convenience
Seating position is the clearest example: height, leg length and the way someone likes to hold the wheel all push preferences in different directions, so what one person calls settled another finds too upright.
Safety and Driver Assistance
Learning where the lights, wipers and demister live before setting off is ordinary preparation. Doing it while parked means fewer moments spent searching later, which is simply a calmer way to begin a journey.
Multimedia and Connectivity
If you rely on your phone for navigation, keeping it charged through a long drive is a separate question from how you take calls or play music, so it is worth checking each on its own terms.