I have noticed something on newer cars, and it’s been bothering me for awhile now. Perhaps you, with your deity-like omniscience (and access to inside information) will be able to provide some clarity.
As you can see from the picture below, a new Toyota has this vertical flat area around the wheels. And it’s not just this particular model of car — nearly every modern car I see on the road today has a similar design feature, though they vary in the width of the flat area around the wheel arch. Contrast this the Clinton-era Toyo at the bottom, where the body lines follow a graceful curve all the way to the fender opening.
I have a 2015 Civic, but my question applies to lots of cars.
I live in Maine, which has lots of nice weather for driving around with the windows down. The buffeting, or “helicopter effect”, with the windows down is driving me batty! Also the “white noise” of the rushing wind is quite loud when the windows are open. I can adjust the windows to limit both issues somewhat, but is there anything else I can do?