Comfort and Convenience
Some occupants prefer cooler air on a summer run into town, while others want warmth on their feet; that split is personal, not a single right setting.
Safety and Driver Assistance
Before a dawn airport run, finding the lights, washers, and indicators while still parked means those actions are not learned at the first wet junction.
Multimedia and Connectivity
If a phone can be charged between daytime appointments, it is more likely to have battery for tickets or messages after the last stop.