Comfort and Convenience
Cabin temperature divides people more than almost anything else: what one occupant calls pleasant, another finds stuffy. Clothing, the weather outside and simple habit all feed into where someone wants the setting left.
Safety and Driver Assistance
Drivers who have just changed cars often know the route better than the cabin. Checking how the gear selector, parking brake and mirrors are operated while stationary removes that guesswork from the first junction.
Multimedia and Connectivity
Radio or streamed audio is worth separating from calls and from charging: one fills the drive, one interrupts it, the third only keeps the battery topped up while the other two run.