Comfort and Convenience
Seating position is a personal preference: people differ in height, reach and how upright they like to sit, so a setting that suits one driver feels wrong to another. Habit counts too, since a familiar position usually feels correct.
Safety and Driver Assistance
Learning where the basic controls sit, such as lights, wipers and mirror adjustment, is easiest while parked, because a stationary moment allows unhurried searching that a busy street does not. This is worth repeating after time away from a car.
Multimedia and Connectivity
Battery level is the common everyday concern, since navigation and messaging drain a phone quickly. Where a charging option is available, using it for power keeps that need separate from calls or listening, which rely on other arrangements.