the difference I see is this (from the post: turning mostly to follow terrain for example)
1980= skiing a wide open bowl with some terrain changes, pitch variation, a few rocks and so on. skier establishes the fall line below him, heads into it with a check turn, links fairly short, tight turns, controlled turns all the way down the line, maybe tightening up more if the pitch increases. same turns he made down the coloir, same turns he made on the little hill returning to the lift. same turns. everywhere, all the time.good skiing. no doubt, but a limiting concept, and of little interest to some rebellious and new to skiing.
2010=skiing a wide open bowl etc etc. 2 big turns following the terrain of the slope one square upper body followed by an outrageous rotation turn, fully extended, big body shape, straight through a gap between rocky spines in a casual upright stance with hands down at his side, a couple big checks to line up a jump, big air back flip that no one saw coming over the cliff on the side of the bowl, straight out to the flat for knuckles and kudos from his pals.
not the same, no not the same at all.