yeah, it's capable. have you seen the films and photos of them testing them in Canadian tundra in teh dead of winter? The cars had no problem. Two issues though: car is low and excess snow on secondary roads will cause car to easily bottom out (kind of a sick feeling).
salt is awful on cars even if they are "rust proofed" there are parts on car which are impossible to rust proof.
Water from melted snow inside car will start mildew and dampness problems unless youre very careful.