Reviving this thread due to relevant experiences.

Snow today in CO and oh boy did I see a lot of trucks with ATs, and others to be fair, having a bad day on Berthoud pass.

Near the top of the pass on the Clear Creek side: F-150 suck in the middle of the roadway with a red suv trying, and failing, to tow the guy the last 1000 yards to the parking lot at the top of the pass. They were just crabbing sideways toward the shoulder.

A few more 1500s pulled off to the side of the road with their flashers on.

Two jacknifed tractor-trailers in the roadway halfway down - one with a rental car buried in the rear bumper of the trailer. One idiot was chaining up his rig while it was half buried in the shoulder ditch.

Some poor guy in a Tundra nearly jacknifed his empty trailer while skidding through a red light on the West Side near the resort.

I had my snows put on the DD last week and had zero issues. Did a few traction checks in spots I saw others just stuck, spun, or otherwise having an interesting afternoon and I had no problems at all.

So, again, if you rarely drive the mountains or can stay home when it gets bad / are sure you'll never encounter unexpected weather then All Season ATs may be fine for you. Personally, I prefer to avoid any white knuckle moments when I'm trying to get somewhere.