Newer vehicles are better at resisting the effects of road de-icer. I changed the oil in our 2016 Malibu last Sunday. Aside from a rusty buildup on the leading edge of the oil pan - as a result of stone chips in the black coating, the car is pretty rust-free. But, there's a lot of plastic on it. The brake rotors don't look too bad for rust. That said, I've seen 2009+ GM pickups here in MT with rusted out fenders, rear bumpers and so on...

My opinion... either make the fed/state/city road departments begin using a more environmentally friendly road de-icer that doesn't cause rust or make the auto industry responsible for rust repairs.