I skimmed it, but do not claim to have read in depth. I find discussions like that one rather hollow. Karate teachers are mainly still trapped inside the box, meaning they know almost nothing about karate history. Their speculations are entertaining but are not useful.
(Don't take that as a criticism of Iain. Quite the contrary.)
Modern "traditional" karate is a Japanese boxing and dancing art for intermural college competitions. It was invented by taking kendo as a model, and then substituting a small set of Okinawan techniques for the missing sword. Modern karate was never a historical combat art. It was never proven in real combat. It was never practiced as a martial art in Okinawa or anywhere else. Therefore, attempts to dissect the "martial advantages" of the modern art are just pointless. It is like debating the combat advantages of shadow boxing.
My interest is the art that came before "traditional" karate was invented. That art was in deadly earnest, and offers lessons to us all.
When the "traditional" teachers are ready for a broader view, we'll be here. By "we" I refer to the karate-jutsu community in general, and
UKAI in particular. In the meantime, the kata are falling one-by-one to persistent historical analysis, and life is good outside of the box.
(I revised this response. There was a bit too much curmudgeon showing in the original.)