I live in Canada, have a 15 year old Hyundai Elantra that sees -40 degrees every winter, I ski 50+ days per year so it sees a ton of snowy roads, and the car has had exactly zero mechanical issues. I've only replaced brake pads, rotors just this year, and tires.
The top 3 things about bad weather places is water / moisture, dirt / sand and road salt. That causes extended wear and body damage over time which leads to cars not lasting as long as a population in the area. It's not the cold and if you keep it dry, clean, sealed and well maintained then you can avoid the issue, it's just a lot of work and nobody does it.
