Comfort and Convenience
Cabin temperature divides households more than most things: one passenger wants warm air, another fresh. Agreeing on a setting, or dressing for the journey, usually resolves it on shared trips.
Safety and Driver Assistance
Preparation pays off in unfamiliar conditions. Sitting in the parked car and locating the hazard switch, demister and horn by touch means you are not hunting for them in rain or darkness.
Multimedia and Connectivity
Hands-free calling matters most to people who drive for work. Where such a function exists, call quality depends on microphone placement and background noise, which is unrelated to how music sounds.