I used to work as a mechanic in IL back in the day. It became normal for myself and my gearhead buddies to keep winter beaters and leave the nicer cars/motorcycles parked until the roads stopped getting salted and rain could wash it all away for summer. I'd go through winter beaters like they were shoes, whole used cars!
The amount of time and money I used to spend on automotive expenses back there is batshit crazy compared to what I spend in CA.
And the yearly rebuilding of all the roads trashed by the salt+plows. I wonder if it's less of an issue now with climate change.
2) Roads in Minnesota are not destroyed by salt + plows. Roads are destroyed by frost heave and by heavy trucks traveling on them as the ground freeze gradually melts in the spring. Locales in Minnesota have "road restrictions" in the spring to try to minimize the latter effect - that is, dump trucks/semis are limited to about 50% capacity per axle to try to minimize the damage done to the roads they drive over.
If only the primary corrosion problem on automobiles were the painted unibody, which still is only a minor scratch or collision-repair away from devolving into the same rotting trash.
Especially with newer vehicles employing more aluminum parts, often fastened using steel fasteners if not to steel surfaces, you get plenty of galvanic corrosion at these critical junctions. The dissimilar metals exposed to saltwater electrolyte is basically a battery. And this is occurring out of sight unless you get under and wrench on your own vehicles, where there's substantially more exposure to the road salts.
It's better than it used to be but anything in the same plane as the tire rotates is still doesn't last. Rust also starts at the holes in panels where plastic trims attach and it's not uncommon to find 5-10yo vehicles that are missing large chunks of the rocker panels or areas around the rear perimeter under the bumper cover. Anything that routinely sees a gravel road will be destroyed in half the time.
It's roughly as bad, some years are worse than others. Climate change hasn't made winter better.
I still have contact with friends back home and the impression our convos leaves me with is that they're out riding mountain bikes in the winter months my childhood would have had me sledding in a snowsuit.
But maybe it's just irregular and there's lots of icy/slushy road days. I admit I don't pay attention to the weather forecasts back home, it's just passing conversations with old friends combined with what seemed like a trajectory towards increasingly mild winters before I left the state.