I used to ski on open water, now I only ski at private sites. Wake boarders and surfers with massive wakes and crews never stop for more than a few minutes to change riders.
I snow ski over 100 days per year as well. Running NASTAR doesn't interest me, I'd rather cruise the whole mountain, glades, steeps, etc.
I'm far beyond middle aged at 71 but find completing the course and fulfilling my goals very satisfying.
Smooth water is critical to course skiing if you don't want to get hurt.
The sport isn't dead, it's just shifted to private sites.