Comfort and Convenience
Cabin temperature is a common point of negotiation, because people differ in build, clothing and how directly air reaches them. Agreeing on a setting early usually works better than repeated adjustments during the drive.
Safety and Driver Assistance
Knowing where the lights, wipers and hazard switch sit before setting off means less searching when conditions change. A short pause in the driveway to locate them leaves attention free for the road afterwards.
Multimedia and Connectivity
Passengers often arrive with low batteries, so the question is simply whether a charging point is reachable from where they sit. Where one is available, sharing it in turns avoids the usual silent competition.