Comfort and Convenience
Comfort preferences differ because bodies do: the seating position that suits one driver can feel too upright or too low for another. Where adjustment is available, small changes often matter more than large ones.
Safety and Driver Assistance
Learning where the lights, wipers and hazard switch sit is easiest while parked, since a journey rarely offers a calm moment to search for an unfamiliar control.
Multimedia and Connectivity
Phone needs split into three separate things: keeping the battery topped up, taking calls without holding the handset, and playing audio. A car may cover one of these and not the others.