Comfort and Convenience
Preferred cabin temperature is a good example: what one person finds pleasant, another finds stuffy. Build, clothing and how long someone has been aboard all shape that judgement, which is why settings change between drivers.
Safety and Driver Assistance
The few minutes before setting off are the natural time to locate lights, wipers, the hazard switch and the demister. Doing that while parked means an unfamiliar control is not being hunted for mid-journey.
Multimedia and Connectivity
Keeping a phone charged matters most on longer trips, where navigation empties a battery quickly. Where a suitable power source is available, a cable stowed within reach means topping up without unpacking a bag.