When did Donald Ross do most of/finish his tinkering with #2? Was it around the time that steel shafted clubs replaced hickory, with pros not much later starting to realize & utilize the full potential of that technological change?
I know it was years after the introduction of steel shafts, but its interesting that Ben Hogan won his first tournament, the North South, at Pinehurst #2, in 1942 -- with a heavy-shafted driver Byron Nelson had given him.
With Adam Scott's informed perspective in mind, it does feel like we're at a cross roads, i.e. that what had 'worked' for many years (ie lengthening & narrowing) doesn't work anymore; as Scott says, you can't make courses long enough for the pros, and driver is the easiest club in the bag for them, all of them, to hit far and straight (which negates the advantage that a truly/naturally great driver might otherwise have).
Sure, the weather etc; but it feels like Medinah is an example (like Merion etc etc, it seems to me) of a failed paradigm, an outdated conceit and aging methodology that had its time in the sun but that is now passe: a newspaper made out of paper, a land-line telephone, a floppy disk.