I’ve never skied east of Colorado, though by reports it seems there are simply fewer available ski days in the NE and Mid-Atlantic due to a shorter season, and fewer days means fewer skier visits. So even if the snow isn’t as much fun as ”out West” the availability to ski or board may be more limited, especially around the holidays when resorts typically see a large number of first time or occasional skiers.
More population growth in places like Seattle, the Bay Area, SLC and the Front Range means more skier days in those regions. Crowds at any resort in the PNW on weekends is not new, but the size of the crowding the past few years is unprecedented. Maybe it is the availability of multi-resort passes, which are only slightly more expensive (or even less expensive) than the single resort season passes they replaced, but a lot of it is due the overall population growth in these regions.
So it may look like skier days across the US as whole looks pretty flat, but I can tell you that around here, it is anything but flat.
This year was very unusual, with poor early season conditions, then a large amount of snowfall at the end of December, then nada for a couple months, then an amazing April and even into May. So great spring season conditions for die-hards and those of us in “lunatic fringe mode”, and probably very little in the way of new participant growth.