Comfort and Convenience
Preferred cabin temperature is a good example: some people are comfortable noticeably cooler than others. Build, clothing and how long someone has been sitting all shape that judgement, so a single shared setting rarely suits everyone.
Safety and Driver Assistance
Locating lights, wipers, demisting and hazard controls while still parked is worth a moment. Doing that preparation calmly means one less thing to work out later, when conditions change and hands are already busy.
Multimedia and Connectivity
Taking a call without hunting for the phone is a common need. Where hands-free calling is available, the useful part is knowing in advance which control answers and which ends, since that differs between setups.