One thing that generally fails to translate here on this alpine-centered forum is that some of our nordic people are very serious about the sport. They are not casual shufflers. They're doing like 30 - 40km days. So if "xc tracks galore" means 35k that's one day's worth before you start repeating yourself, even assuming everything is open
A "major" 35k xc resort is very much a northeast thing. I started skiing in the Midwest, we have municipal xc networks that are larger than that!
That said, the "Alps" suffers the same as the northeast. Namely, in a mountainous region, the only good geographic location for xc network is in the valley. So you're not going to get huge sprawling networks of hundreds of km of trails. You need wide open country for that. Go to the Nordic countries or Siberia. (Ha, it's called Nordic skiing for a reason. And sadly Siberia is off limit at the moment).
Having said all that, your nordic cohorts shouldn't begrudge the Alps, if they can sustain their love of sliding in skinny skis in the northeast by repeating the same track day after day after day in their local sub-100k network.
In my younger (and fitter) days, I went to St Moritz, packing both my skinny skis and fat planks. On my first day, I easily "exhausted" 30 of the 150k xc trails (mind you, that's at 6000' elevation). But, having had unbelievable lunch at one of the restaurants next to the trail halfway in my 30k loop, I did a slightly different configuration of the same loop for the express purpose of having lunch at the same restaurant!
Had I been only doing xc skiing, I wouldn't have been shortchanged with that somewhat "limited" mileage of the available trails. But since I was doing both, I didn't even manage to cover all of the 100k+ xc trails and all the other little restaurants.