Earlier quoted context omitted.
Vans usually have a very difficult time off-road or in mountainous terrain. Vans are commonly used in urban areas, especially by businesses, but suburbs, rural, and construction benefit from higher clearences of SUVs and trucks. SUVs are also usually much better in hazardous driving conditions because of a more optimal weight distribution.
Vans work just fine on mountain roads. And driving off road is simply not a thing for like 99% of drivers. 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.
I deal and have dealt with enough deep snow that would eat a van.
I still might get a Sienna Hybrid for daily commuter