Comfort and Convenience
Some drivers like fresh air drawn in through an open window, while others prefer the windows shut and the fan doing the work. The preference follows habit, weather and noise tolerance rather than any rule.
Safety and Driver Assistance
A driver who has already found the controls is not reaching for them while moving. Doing that checking at a standstill, before a journey begins, is simply the calmer moment for it.
Multimedia and Connectivity
Listening choices vary across a journey: radio suits short trips, longer ones often call for stored music or spoken audio. If a system offers such sources, switching between them is its own routine, unrelated to charging.