50% of U.S. truck drivers are cigarette smokers, and they want that vent window so's they can flick the ash out the vent, plus they just like the vent window the way it's been for many years.
So, trucks makers like Mack, Kenworth, Freightliner, Volvo, Peterbilt, Hino, Mercedes and Scana still make their big trucks with the vent window. ....
If a 2024 candidate for president runs on a platform that requires all new cars to have vent windows, and all old cars to get retroactive vent windows, I will vote for him/her! Give me a vent window, even if the next president is an alien from outer space!