As a lifelong Utahn, I can answer that Utah highway crews salt. A lot. There was a day when that was important. As a child in the 60s and 70s, I remember seeing a lot of cars, particularly Hondas and Subarus, with a lot of "body cancer." If you're driving a classic car, this will matter a lot. But today's cars are so much better that I really don't think of it any more. I typically hold onto my cars until they're 15 to 20 years old and haven't seen a bit of rust on any of them for years.
I am currently driving a 2003 Toyota Sequoia.. It gets all the winter driving because it goes better in the snow than my other cars. I usually drive it snow skiing about once a week this time of year. Even though this car is turning 15 this year, there isn't even a hint of body rust.
The closest thing I have experienced to body rust in the past 30 years is called rail dust. So-called because it started out being associated with steel train wheels running on steel tracks and giving off little bits of metal that land on other surfaces then rust. In Utah, we get a fair amount of "rail dust" from snowplows scraping along the streets and abrading the steel blade on the pavement. When you see a snowplow at night, you will sometimes even see sparks. Those bits of metal can end up on your car's paint and don't like to come off with normal car washing. The way to tell if you have rail dust as opposed to a rusting car is that with rail dust, you have the same amount of rust specs on plastic car parts as you have on metal. While I try to get rail dust off of my cars for cosmetic reasons, I don't worry about it eating through the paint or anything like that.
Unless your daily driver is older than about 20 years old, I would say "welcome to Utah!"
