Comfort and Convenience
People rarely agree on cabin temperature. Someone sitting in direct sun usually wants cooler air than a rear passenger in shade, which is why settings get renegotiated on a shared journey.
Safety and Driver Assistance
The few minutes before departure are the easiest time to set the mirrors and seat and find the hazard switch, because none of that competes with traffic for your attention.
Multimedia and Connectivity
Calls work differently from audio playback. Where a car supports hands-free calling, what matters is speech clarity at both ends, which depends on microphone placement rather than on music sound quality.