I suspect Halford would die from apoplexy were he able to see in many of today's fly boxes including mine.
Apoplexy at least with the sight of Sawyer's PTN . . . tied with wire not silk . . . good grief! Lead underbodies, brass and tungsten beads would have been the death of him! 150 years later there are still those who don't, can't or won't grasp the fact that fly fishing is a 'broad church' that gives us rein to fish whatever way appeals to us within the rules of the fishery. Dry fly on a Borders stream, lead line from a drifting reservoir boat, pike on the canal? There is no moral etiquette or hierarchy.