Guys...
Threads like this are precisely why I started playing with hickories, gutties, etc. And that was to see specifically what the differences are that technology makes on the game.
I've noticed a few major effects of technology on the game...and correspondingly a change in golf course architecture (most likely).
First, playing with pre-1900's hickory clubs (smooth faced irons, no sand wedge) makes bunkers a SERIOUS hazard. You don't just grab sand wedge, pop it out, and move on. It takes real thinking and planning to simply get out.
Second, smooth faced irons don't cause the ball to bite on the greens...rather it rolls out a lot more. Again, rather than eye the pin, fire for it, have the ball bite and stop...I need to look at the green and see how the ball will run out.
Thirdly, distance is a major factor. There is a chart early on in this thread that talks about how far the elite players hit the ball with certain eras of golf balls. NOT ME!!! My gutty tee shots go 140ish on average...even when using an r9 driver...not the 190 listed.
So, putting this all together in terms of architecture.
The third point is easy...you don't need a 7,000 yard course. The chart from Scott M's work clearly illustrates that point. And the quote that CBM didn't think that Merion needed to be longer than 6,000 yards.
Point 2 rears its head BIG time when I play hickory golf on modern courses. If I have to get over a hazard and stop the ball on a green before it runs into another hazard behind the green, that is an issue. Say lofting a ball over a creek onto the green and stopping it before it rolls into a bunker behind the green. That is really challenging for me.
And this kind of leads to point #1...greenside bunkers. They can be serious hazards. In fact, some (like Big Bertha on Rivermont) I need to play backwards out of with my hickory clubs (no sand wedge remember).
Anyway, Ralph is WAY more of an expert on hickory and/or gutty golf than I am...but that is what I have noticed first hand regarding difference between modern technology and hickory golf.
BUT here is the key to me...it is the same game. You still have to navigate the course and put the ball in the hole. It is just in the modern game you have a more robust arsenal, therefore the courses need to be more challenging (deeper bunkers, more demanding accuracy around the green, longer) to give the golfer the same mental stimulation. But it is the same game, if you play it the same way...brain vs. the land.
PS...I've asked for a set up persimmon's and blades for Christmas, so maybe next year I'll be able to see the differences between hickories, persimmons, and modern technology on golf course architecture. Aren't you guys excited!?!?!?