Comfort and Convenience
Seating preferences vary because bodies do: height, leg length and the habit of sitting upright or reclined all shape what feels right. A position one passenger settles into quickly may not suit the next person at all.
Safety and Driver Assistance
Working out where the lights, mirrors and hazard switch are while still parked is simple preparation. Doing it before departure means the first roundabout or sudden shower is not also the first search for a control.
Multimedia and Connectivity
A phone that arrives empty at the destination is a common travel annoyance, since navigation drains it steadily. Carrying a cable suited to whatever power outlet is available keeps charging separate from questions about calls or audio.