I'd be welcoming them with open arms. Year on year the Vail resorts get better and better (I've skied them all, and Kirkwood too). Year on year Cairngorm gets worse and worse (IMHO). Off to Tahoe in a couple of weeks again
and haven't skied at CG now for a couple of years. In fairness Glenshee does get my business if there is snow but I've only managed 1 day this year
What the Vail resorts seem to manage is to be open on the opening day with complete runs, and stay open until closing day. And this isn't because there's guranteed snow on these dates - if there's not enough natural snow they make it and open and close on time. I gather it also means they rely pretty much exclusively on permanent workers for the fixed duration of the season as apart from closures due to high winds ther'll be skiable snow and uplift running every day.
The uplift gets serious investment (and hopefully some of the older lifts at Kirkwood will get replaced, although there's quite a new lift that isn't 'high speed'), as does the supporting infrastructure of restautants, accomodation, retail etc. I know (from starting skiing in Scotland nearly 45 years ago) that the Scottish conditions are way more challenging than the resorts in the US with wicked termperature fluctuations and high winds, but it's always struck me that with serious, really serious, investment there is a vaible year-round business there. I've always been to Heavenly in the winter and it seems busy enough, but I'm told by the locals it's nothing compared to the summer trade focussed on the mountains and the lake. There's Loch Morlich
I can't see it ever happening though - but a nice pipe-dream.