In the early 1980s, we had family friends who lived in such a house on the hillside in Anchorage, Alaska. It seemed to work very well there and then. In particular, I enjoyed how walls were rearranged from time to time as their young children grew or even temporarily for "house parties." Tom was a guitarist, Mary was an artist, and they both were active in community theater. Having read the Roberts book in the early 1970s, I immediately recognized the house when we first visited Tom and Mary at their home. Certainly, we learn more as the decades go by, or at least I hope so. I still regard the book as EXCELLENT for its basic philosophy and principles even if some details may be obsolete because we have learned more since it was written.