Having grown up in the mountains, and currently living in a hilly snowy area, no thanks I'll keep my SUV. My in laws have a mini van, and it's not great.
I deal and have dealt with enough deep snow that would eat a van.
I still might get a Sienna Hybrid for daily commuter
Reality is, people buy these things thinking they would drive them off road, and never actually do it.
It's possible to make an off-road van, by the way. It's just that real demand is so vanishingly small that you don't really see them.