Comfort and Convenience
Comfort is personal. Two people of similar height may still want different seat angles, a different cabin temperature or a different amount of air movement. Settling these before setting off is simply part of making a car your own.
Safety and Driver Assistance
Learning where the essential controls sit before moving off is a small piece of preparation. Hazard lights, demisting and mirror adjustment are easiest to find while parked, and that knowledge carries over to every later journey.
Multimedia and Connectivity
Arriving with a phone that still has battery matters when it holds tickets, directions or a parking app. If charging is available on board, topping up during the drive keeps that separate from whatever is playing through the speakers.