This storm was an exception. This much snow isn't always melting in the sun and rain a day later. Did you live in NY a few years ago when it was near crisis with no place to put all the snow there was so much?
The idea you can just park it for a few days assumes you have another vehicle capable of driving in the snow that you don't otherwise need (what if your wife had the X5 out somewhere...). It also assumes you'll never get stuck somewhere when the snow starts or have any emergencies where you need to drive in the snow with the car.
It's all personal preference. How prepared do you want to be... Personally I don't like the idea of not having a capable vehicle in my hands at all times. If the 335 was my weekend car and I had 2 other awd vehicles in the garage, I'd keep summer's on it, and would've skipped the x drive. But then again, if I wanted to keep a 3rd car, the weekend car wouldn't be a sedan
