Good question, Pat
The difference between current expectations, philosophies and practices and those of 100 or so years ago intrigues me.
Today, clients and architects seem hell-bent on producing courses which are ready for serious play on Day One, so designed that there is relatively little room for change in the routing, and supported by egos which seem to be resistant to any change, even if the possiblities exist.
Compare this to any of the previous "golden ages." In the first one (~1850-1900), layouts were more templates than finished products. Courses like Carnoustie, County Down and Dornoch were altered almost immediately after the original deisgners (e.g. Alan Robertson, Old Tom Morrris) left and then continuously, over periods of decades. In the second one (~1915-1935) places like Merion and Pine Valley and Augusta and Muirfield and Sunningdale were also frequently altered.
To me, the old designers seemed to be more comfortable in their skins in letting their clients do with their properties what they wished. Part of this was obviously the logistical difficulties of getting back to theier courses in the days of arduous transport. Other reasons I would posit, however, included faith in the quality of the people in whose care they left the courses, (e.g. Sutherland in the case of Morris and Crump in the case of Colt); the financial exigencies of their day, and (some of) their lack of hubris.
Do today's architects really think that they got it 100% right on any of the courses they have designed and had built? If so, why and how do you know?
Rich