You're close. Let me explain: I wouldn't choose them for heavy duty snow rallying (I've actually done that, successfully).
In my lifestyle, I only go out in cold, light snow conditions; for a variety of reasons. I'm old, and wouldn't want some idiot hitting me and forcing me to endure standing around waiting for a tow or worse in the Winter. Two, cold itself is a factor and they are good for that. Three, they are run-flats, which I like. And lastly, I don't have to drive at all, since I'm retired, so if it's questionable conditions, I just turn up the heat and stay home!
I had my fun with summer performance tires. They only lasted about 15K miles when I got my car new. Been using all seasons since. I get about 45K miles on those. I could tell the change in handling characteristics, but couldn't justify the cost of going with 2 sets of tires or burning through multiple sets of summer tires.