I just took a 6 hour road trip with my daughter, her husband, and my two granddaughters, who fought the entire trip. I was sitting in the back seat of a Kia Rio with the kids, and then I got carsick. The roof of the car didn’t sound like such a bad idea to me at the time.
I don’t know how my parents could handle it. Twice a year they put us in the back seat of the Buick and drove from home (coast of NC) to Mom’s parents near Nashville, TN. My sister would always get sick in the mountains, and Dad never wanted to stop unless the car needed gas.
One good thing that came out of that is that I have no problem navigating when going on a trip. And I’m one of the few who can actually correctly fold a map. Used to collect the free road maps when I was a kid.