Comfort and Convenience
Cabin temperature suits people differently, since clothing and how warm someone feels while concentrating both vary. That is why a front passenger often wants a setting a degree or two apart from the driver.
Safety and Driver Assistance
Adjustments made while parked, such as mirrors, seat position and demister settings, have your full attention. Doing the same in moving traffic divides it, so the parked version simply costs less effort.
Multimedia and Connectivity
Listening habits differ: some people play files stored on a device, others stream over mobile data. Streaming depends on signal, so a locally stored playlist stays available in tunnels and rural gaps.