No, problem Craig, I don't take nuthin personal.
I don't dispute accepted training lore, but what do we include, and when, and what do we leave out?
I do dispute the terminology, because all voluntary movements are controlled by the brain by the processes of neuromuscular coordination, with the help of feedback from the the muscles and feet etc. So we can continue to improve long after we have maximized our aerobic capcity.
But so what you may ask?
Well we should ask ourselves how much can we improve, and why are the best runners so much better than others who train hard for years?
The answer is that we can greatly improve our economy at every pace, but how do we do that?
If we consider that our fast twitch fibers are mostly fast oxidative, that is; they have a high aerobic capacity, but contract more powerfully than slow twitch fibers, then it's obvious to me that this gives us the potential to run faster over longer distances by improving our ability to recruit these fibers. The skill with which we can control this ability is neuromuscular coordination, a skill for which there is no known limit for improvement.
If we also consider that all paces faster than about 5k pace are VO2max paces then it's obvious that all training paces involved in distance running should be covered.
Although we may think that we are doing this anyway, we can always improve the effectiveness of these tasks.