You must have had good experiences with salt and cars.....the salt totally DESTROYS the metal on the car. I had a 1997 GSX that drove in the winter for one year....I could not break any of the bolts under the car loose after that!! I had to use a torch for everything!!! I want the MR to last more than three years, so yes, it won't be driven here in the winter.
As far as daily driven....I just moved from California. I drove the EVO every day 70 miles to work round trip. I had 24,000 miles in one year. I drove to Arizona and Montana with the car ( Good part: Hours of triple digit speeds in the desert

Bad part: no cruise control to keep me in check

) I love to drive the car. Not driving it everyday makes the times I do drive it more sweet.
I love the car and it is my "fun" car. Driving cars in the winter will definitely shorten it's life span. I want to be able to work on the car without having to replace all of the bolts every damn time.
Working on your car with hand tools including turbo removal is sweet. Having snapped bolts, bolts seized with rust, having to use a torch to remove exhaust bolts that snap sucks balls.
Plus, I have a nice winter car ( 1999 Toyota 4Runner) So why mess my car up?