I would argue ;-)
But yes, tires can be a case, I believe they come together with new car, looks very good, and for sure low millage. But 6 years already, so probably not performing as good as they should.
However, the main issue in my area is a white frost - I'm leaving at coast line, wet roads doesnt like freezing air. Another 'funny' weather is when after several days of dry freeze (all road and stones well frozen) the air temperature switch to +10 and rain, which leads to black ice. That's where you find useful studded tires. Which I have on bike, but not on i-Miev. Winter tires works well on snow usually, all cars struggle in icy condition. Then weight and 4x4 make a difference ;-)
The complement for i-Miev is quite reasonable traction control system, worked hard in few cases.