I'm going with TEPaul's train ride through the countryside rather than taking Tom Mac's subway to the natatorium.
I'm trying to say that I believe the building architect is dealing in creating a built space within, bringing that function with a defined area to within a confine.
A GCA is planning a function outward, towards open and natural space.
Tom MacWood, is there any example of a building that produced a space for a function, that wasn't "built", had to be defined with confines, or somehow contained within walls roofs, floors, etc.
While not 100% pure nature, great GCA often has the element of being found and routed or shepherded upon, or among, or through nature in a more co-existent manner; doesn't it? Like that Behr fellow seems to be saying...
On the question of being able to look 10 years ahead, it is a pity IMHO, but size is what matters on one scale or another.
In buildings, if the architect didn't take into consideration of population growth, and build it big enough; or, didn't take into consideration urban growth and confine it too much in exterior space to add on; or didn't consider that the activity or function would grow in popularity and usage, then he probably isn't all that good of a building architect.
In GCA, size in terms of distance to growth patterns in terms of location and proximity to sprawl or demographics and demand, or distance to the technology consideration to space needed to play the new equipment, probably shows an element of a forward looking GCA.
But, as a GCA technique of design, camoflauge like the Good Dr. employed, seems more in tune with Tom Paul's idea of a good architects harmony with what exists and co-exists in nature, and stands up to time.
Fall-in Waters, seems to be what some say was a good building architect's attempt to provide a human function of living space within a confined space trying to emulate or cohabitate with nature, but he didn't look far enough ahead to realise it would in deed be "fallin in the water".