"Kadaffi out of power" has already suggested a few areas and ways that a "classic" Lydiard approach would have to be modified, to make it more "modern". Note it's not only "his" methodology. He even says he's not like top coaches, but does his own thing. He's attempting to characterize elements which exist among top coaches today, that did not exist in 1960.
I don't see this so much as a "radical" change of training, although there are changes, as a shift in thinking, and emphasizing which elements are important in designing training over a season, and over a career. Lydiard builds several important ingredients, one at a time, and then mixes them all together for the big race. Modern approaches "promise" to do the same thing, in less time, by adding complexity to earlier phases, without compromising training progress. I guess.
And everyone sometimes has to answer to things in life besides "letsrun". Don't read too much into a brief disappearance.
just an observer wrote:
Noticed something interesting? The kid asked a long serious and SPECIFIC question: Khadaffi can't answer it, won't answer it, and he disappears...