Comfort and Convenience
Cabin temperature is one of the clearest examples of personal preference: what one occupant calls comfortable, another finds stuffy or cold. Metabolism, clothing and whether someone is driving or sitting still all play a part.
Safety and Driver Assistance
In an unfamiliar car, the first minutes are the cheapest time to learn the stalks, the gear selector and how the parking brake releases. Doing that in a quiet place keeps guesswork off the motorway.
Multimedia and Connectivity
Radio coverage thins out between towns, so many travellers prepare offline music or podcasts in advance. Calls are a separate question again, and where a phone sits while charging affects how easily it is reached.