I think the answer here is moving towards RNP APCH (AR), just like Juneau in Alaska, Kathmandu in Nepal, Queenstown in NZ and all these weird places where the construction and use of an airport is not ideal due to the terrain considerations, yet its use is more and more popular.
Correct me if I'm wrong but RNP APCH is just another phrase for GNSS or RNAV APCH, but it can be to a higher tolerance. That said, I don't disagree with you, however, it is going to be rare that a general aviation aircraft goes through the hoops and hurdles (and cost) to get a RNP approved to a higher tolerance than the usual GNSS or RNAV.
There is on YouTube a video from the cockpit of a CRJ doing an approach to KASE in foul weather and right on dusk or last light. The poster explained that they were doing an approved approach that has lower minimums than the usual published approaches. I suspect that it was a RNP APCH but it is not stated.