This is from a few years ago. Apparently he retired: https://www.kuer.org/arts-culture-entertainment/2021-10-22/j...
Since I've been skiing this has been how I've experienced all the terrain. His maps just are skiing to me. But, interestingly, with the rise of smartphones/gps apps like Slopes and the late lamented Fatmap have started to move the ski world towards 3d terrain maps and away from these artistic maps.
I have a side project I've been meaning to dust off that translated GPS coordinates to locations on Niehues maps. I got it working reasonably well but the distortions were significant enough that it needs a lot of control points to do the mapping.
I hate using my phone while snowboarding. Between the cold and the often lack of service the battery sinks like a stone on the slopes to the point where I have to use it sparingly or risk losing communication with other people on the mountain. So risky to pull the phone out on lift too. I've known people who dropped it there and then it's gone forever. Pinch and zoom would suck in the cold too. I'll take the free trailmap I can unfold with my mittons on any day.
(Year added above. Thanks!)
I hope and believe that a screen map can't ever compete with the size of printed maps and the big boards they have on runs.
There's also something functionally superior to having someone who created an aesthetic and standard across ski maps.. someday they'll evolve and we'll have something different, but being able to show up to a new ski mountain and immediately understand the map: it's excellent UX.