Comfort and Convenience
Preferred seating position is a common example: some people sit upright and high, others further back and lower. Height, leg and torso proportions, and long-standing driving habits all push that choice in different directions.
Safety and Driver Assistance
Spending a few minutes with wipers, lights, mirrors and climate controls before setting off means less searching later. Familiar placement is learned rather than obvious, and every cabin arranges these everyday functions a little differently.
Multimedia and Connectivity
Keeping a phone charged on longer trips is a separate matter from playing audio through the speakers. If a suitable power source and cable are available, charging can continue while sound arrives by whichever route is set up.