Comfort and Convenience
Seating position is a clear example: preferred height, reach to the wheel and how upright someone likes to sit vary with build and habit. Two people can rate the same cabin quite differently.
Safety and Driver Assistance
Spending a few minutes with lights, wipers, demisting and hazard controls before setting off means they are already known when they are wanted. Preparation of this kind is simplest while parked, without traffic competing for attention.
Multimedia and Connectivity
Keeping a phone charged through a long day is a separate need from taking calls or playing music. Where any charging point sits, and whether audio can be adjusted without looking down, both matter.