I had written that a few years ago, and have since corrected my mis-statement as to the "avoided crown" part. mea culpa.
it was just that in a number of the "retail giant's" distribution centers I had been into had a lot of crown reach but were still running very many (older style) Barrett jacks. and I had no information as to why, nor would I think anyone outside the equipment purchasing department would actually have any knowledge as to the reasons for what they purchase.