Comfort and Convenience
Seating position is a good example: some people prefer to sit high with a clear view forward, others low and close to the wheel. Reach to the pedals and preferred mirror angles differ too.
Safety and Driver Assistance
Before setting off, it is worth locating the lights, wipers, demister and hazard switch while the car is stationary. Learning these calmly, rather than mid-journey, is ordinary preparation that any driver can do in a minute.
Multimedia and Connectivity
Keeping a phone charged on longer days is a practical concern in its own right, separate from calls or music. If a suitable power source is available, where it sits decides whether the cable stays out of the way.