It's good you even thought of Peachtree!
Basically in a golf architectural context the decade of the 1940s was the decade that never was!
Certainly WW2 had a lot to do with it but I think the extended severity of the Great Depression ultimately had as much to do with it. That 15-18 year span took a tremendous toll on golf architecture and existing courses too! It was the span of time that the natural evolution in architecture was broken and at the end of that span a new and vastly different "era" began.
It is sadder than we realize, I'm sure, to chronicle the plights of those that we now consider the Greats of the former "Golden Age of Architecture". Most dead and gone but the ones that survived working in antique shops, local government offices, or just retired somewhere with nothing to do, etc! Somebody should write a book about what happened to all those guys--it would probably make people cry today--might even reinspire the idea of Carpe Diem!
God knows what would have happened in the last fifty years if one RTJ jr. had not stepped to the plate the way he did. But the interesting thing and little known fact about RTJ jr is he had a very solid base of understanding and architectural principles from the "Golden Age of Architecture".
Some say although he wasn't one of the pioneers of classic architecture in America, he was one of those that helped perfect and popularize the idea of "strategic" golf design coming out of the "Golden Age"!
But even with that solid base of understanding, for a variety of reasons, he took architecture after the War, some think almost single handedly for a time, in a whole new direction without bringing along with him some of what he must have understood to be the hopes for the future of those old "Golden Agers", many of whom he knew so well and worked with in that time. Some say RTJ jr created the "Modern Age" of architecture almost by himself!
The life and times of RTJ jr himself and the evolution of his work in architecture would be a fascinating study in itself. Most people have no idea how early he got started and how long he continued!
But the 1940s was definitely the decade that never was in golf architecture!