my x3 has the best snow performance of any car I've ever owned. Of course, it is the first AWD vehicle I've ever owned
And my last 2 vehicles were RWD.
I live in Oklahoma, so I don't consider snow/winter tires worth it for the limited bad weather we get. And even then it tends to be ice.
A couple years ago I made a trip to Vail in January, and only had 1 issue sliding off a parking lot. It was one of those "named" weather channel storms, and Denver was kind of scary. I-70 was supposedly closed to cars without AWD or better, or chains.
So, if I lived up north, I would spend the money for the winter tires.