Ian,
I agree with you. After a few phases of downturns, when a major task was (for most of us) bunker reduction plans, I have to cringe a bit when I hear architects who have been through this before say that, "Times are good, I am using more bunkers than ever."
It seems about 90% of new courses built now are billionaire playgrounds. I recall driving to Toledo to visit relatives as a child. In 1960, there were still mega mansions along the River in Rossford and other suburbs. By the 1980s, all of those were subdivisions, i.e., the next generation sold off the unsustainable houses.
I visited my maternal side's castle/hall in England a few years back. They are struggling to keep it together, just like in Downton Abbey.
I know it inhibits creativity a bit, but I always felt (since golf is a biz enterprise, and in a tough biz at that) to design in part for the next recession. Any features that are too much to maintain will probably be removed soon enough.