Bob,
Could not agree more!
Generally, everything improves over time due to better knowledge. I do not believe "flies" and fly fishing are the only things which have not improved given all these years of study and science (aquatic entomology). With better knowledge comes more effective patterns and fishing techniques. Compare anything now with that of, say, the early 20th century; vehicles, medicine, flight, agriculture.......anything.
By the way, would you consider those flies by Ronald's to be winged wets or just wets?
SylVester Nemes has an entire book on soft hackle spinner patterns.