Archie,
I am with you, for a variety of reasons. I wonder if micro contours and frilly edges will be renovated out of existence in the next recession, or in the case of green contours, after the next winter freeze or flood takes them out. Reasons not to like:
Good players don't like the lack of control, while a few archies love it to raise scores. Is a putt you can't control the distance of after it leaves your putter a good design? Colt didn't think so either.
Supers don't like them. a 6" mound with a gentle 10-15% slope, and a minimum pin placement 5 feet away takes up almost 500 SF of useable green space. If you need a dozen pins, that certainly increases green size, and thus construction cost and annual maintenance by whatever you spend per square foot.
Managers don't like them, to the degree they cause three putts and pace of play issues.
Even average golfers probably aren't a big fan, at least if they notice the architecture at all.
Aesthetically, they mimic some of the micro rolls at the Old Course, but do those exist in the rolling terrain commonly found in the US, or do long flowing contours (at least conceptually) mimic natural ground better in most cases?
Basically, they appeal to a limited subset of golfers and architecture nerds......For "great courses" they are certainly a nice feature, at least once in a while. For most courses, they will prove unpractical because construction/re-construction/maintenance budgets are pretty finite, and getting more so.
Just a few practical thoughts from the industry folks who it may affect.