Sub 5000 sq. ft greens considered "postage stamp" sized is interesting. My course (fairly new, 2003 opening) has 9 such greens, so half the course. I wonder if green sizes have shrunk as the intensity of culture has increased. Would seem to make sense.
I also like how the authors highlighted the dilemma of machine maintenance influencing design and vice versa as that is definitely a real tug-of-war.