Comfort and Convenience
People pack different layers because one traveller may feel comfortable in a light shirt while another wants a jacket in the same cabin. Those choices sit with the occupants, not with a single cabin setting.
Safety and Driver Assistance
Knowing where the indicator stalk, horn, and window switches are before the trip begins means those actions do not have to be searched for later. That familiarity is ordinary preparation, done at a calm moment.
Multimedia and Connectivity
Stored music or a podcast on the phone keeps listening available without a live signal. Cabin audio, if present, can play it; if not, headphones still work.