Comfort and Convenience
Cabin temperature is one of the most argued-over settings in any car, because thermal comfort varies with clothing, activity and simple individual difference. Two people in the same seats can genuinely want different numbers.
Safety and Driver Assistance
Adjusting seat and mirrors, then locating the essential switches, belongs before the engine is running rather than at the first junction. Preparation done while stationary is preparation that need not compete with driving.
Multimedia and Connectivity
Calls arriving mid-journey are the common case. Where a car offers hands-free operation, answering need not involve handling the phone; music playback and charging remain separate questions, each depending on what the cabin provides.