What’s your go no go signal for Portillo? If the next storms come in cold? Something else?
The issue is not the snow. More structural.
Definitely go!
Portillo is an iconic and perhaps the most unique ski area in South America, with its setting in the rugged Andes, world-class athletes & ski teams, slingshot lifts, mostly sunny, stable weather, and a country club-like, uncrowded atmosphere.
But Portillo is about the size (likely smaller) of an A-Basin or Solitude. However, no one crosses continents to ski multiple days at either USA resort - only as part of a larger trip including Alta/Bird or Breck/Vail/Copper.
The fact that Portillo can motivate people to do the same speaks to the quality. But four lifetime days at Portillo over 2 trips is enough. Unless I am going to add something new to it, like Southern Chile. (I have been to Valle Nevado, etc, Las Lenas and Bariloche).
You might look at some reasons: why do I go to resorts like Andermatt, Courmayeur, and Engelberg? Because you can ski 5-6k vertical lines (larger than those in Alaska) at a fraction of the cost with decent snow/weather. All services by trams with slightly

more capacity than a helicopter.
If Las Lenas were located 2 hours from a major city, with a secondary route to the summit (vs. Marte), that would be a highly repeatable trip.
Ski Resort Footprints
vs.
(It's somewhat sad and humorous that Portillo has received 600 cm / 240 inches of snow so far (likely on its way to the highest snowfall in a decade), and there has not been a single powder day yet, nor an operational day. It's heading into August without a confirmed opening? The best and worst of times......unfortunately. And anyone for a reservation this week thinking they hit the jackpot? No, closed.)