Mike,
I know of a few individual "fore bunkers" on courses, and some architects are doing lots more random bunkering, but in general, no. Of course, in Ross day, he used 200 yard doglegs, RTj used 250, most of us use 267 (on the way to 285 or 300 from the tips) and bunker accordingly.
Other than perhaps using more carry bunkers just short of the main landing area, I think the majority of Ross (and most architects) bunkers guarded the proposed landing areas, whereas now we tend to use flanking bunkers at the dogleg, or pinching bunkers just past the landing area to catch and punish the long players. So, coneptually, I don't think it is all that different, but just refined over the years.
To start with, you may be thinking of some courses like Flynns outstanding bunker clusters short off the tee, or perhaps some Tillie courses (like Brook Hollow) that also had hundreds of bunkers, but I question how many courses were really like that compared to the total? For instance, TePauls Gulph Mills and many other Flynn courses in Philly don't have scads of bunkers.
I think the effects of the depression had a long shadow, until the boom of the nineties. Now, I already see a return trend to building bunkers that only affect play of the best players.
So what happened from 1937-1990?
Some theories, all based on the fact that our ancestors were very practical folk who did, as humans tend to do, what was best for them, as the circumstances dictated.....some prime reasons:
1. Money matters! Until the power trap rake was invented, there was a substantial cost to raking bunkers. also, in many areas, before tile drains were perfected, these may have also been drainage headaches.
2. People like trees, and hate being trapped in endless bunkers. Not hard to see why the change occurred.
3. The RTJ Oakland Hills design was influential, as you say.
4. Emphasis in first Golf Digest ratings emphasize toughness for scratch players. Why spend money on bunkers that don't challenge them?
5. Continued refinement of the DH elimination ideas regarding both maintenance and speed of play - If someone hits it 180 (as many seniors do) and can't reach the green in regulation anyway, why punish them more? Isn't bogey enough?
6. Modernistic Architecture - with its own spare minimalism in decoration in the 50's. Also, Mies and the strong ideals of "form follows function" affected golf architects. if you are cyncical, you could say that the 50's and 60's were a down time in most design fields.
7. Everyone follows trends. If things were accepted, like the RTj bunkers, then most clubs and architects followed, at least until the explosion of us architect types (spawned by Palmer in the 60's) came of age in the 90'w when our clients had the bucks to allow some architectural freedom.
8. Money Matters, Part II. The trends had a real basis in the economics of clubs and public courses. When people would pay just $10 for public golf, the design did have to do everything possible to reduce maintenance costs, and that was the driving force in the business when I got in it 1977. AT clubs, tax changes about the same time affected membership roles (temporarily, as it turned out) and they faced similar cost challenges.
Tom,
Sorry to offend, and I did go back and read the thread. It seems you keep rephrasing the question endlessly, and I saw several posts (yours and others) of "show me where it said...."
FYI, Ron does have another document showing Burbecks involvment. Not that he could ever prove it to you, my friend!
I think we all agree that Tillie changed his philosphy when working for the PGA. He was given a specific task. Even if he did change ideas up solely for the PGA gig, I can't see what the heartburn is. After all, what happened happened, and we aren't going to change that.