But the run will still be closed for a while, because it doesn't make sense to continually groom the run leading up to and during competition or practice. Generally it's not closed to just snowboarders, but to anybody who isn't involved with the event. At least that's how they do it here in CO.
I'd prefer snowboarding Alta too, but seeing for myself the difference to the snow and to the traffic patterns, I can see my snowboard would undermine Alta's preferential characteristics, so I'm happy they're separate.
Gstaad is an interesting place. They have a yacht club but no lake for example...
While here Gstaad is still open to the "common man". Yes, it's expensive skiing eating and hotels, with a lot of celebrities coming and going. It's also pretty big with 176km of pistes (where in NA how big a resort is is measured in skiable acres instead, so to give you an idea, it has 10 cable cars, 13 chairs and 13 surface lifts). So big enough they have to also aim for "normal people". Just mentioning it since the word exclusive might spring to mind a different kind of resort than some Americans are used to.
The cost exist and engage in the day to day commerce of life there is sufficiently high that the common man does not and mostly cannot bother hence no need for other forms of exclusivity.
Anyway, Gstaad is not far from Glacier 3000 which has most of its slopes at, yes, 3,000m, so anyone in Gstaad doesn't have to go far for (currently) guaranteed snow. The snow up there should be pretty good.
Lack of snow in this region isn't unusual at this time of year, we had a good amount at the beginning of Dec. What has been unusual is the high temperatures, which has meant that snow is now mostly gone and the snow generating machines are of no use. We've also had a lot of rain, which has made managing the existing snow difficult.
This is the future of low to mid level resorts however. In a couple of generations time they won't be able to offer skiing, or the length of the ski season will be significantly reduced. I shot a photo project on this when I first arrived here, nearly a decade ago: https://www.formulanon.com/switzerland-bergbahnen