Earlier quoted context omitted.
> I really regret not having more openness and ability to grasp these things before. Ironic - modern art has such a lack of this same openness, that the classic techniques it despises were nearly lost. It was not enough for modern art to be accepted - classical art had to be driven out from contemporary galleries: The Slade school in London used to be world-famous for turning out fine British draftsmen. A distinguish…
As somebody who's done a lot of life drawing, and a lot of classical stuff in general, I see the reason why it's no longer central to the curriculum. Ultimately, drawing is just another tool, just like stonecarving, crochet, or dance, and life-drawing is a practice that is good training for a specific use of that tool - portraiture - that was the economic lifeblood of art until daguerreotypes came on the scene. So re…
> The question is, why did they continue for so long?
Well, as said in the original quote, it's apparently also good for internalizing a sense of weight for animation. So presumably they continued at least in part because it's good for things that aren't as obsolete as portraiture -- animation isn't the only way to make money in art these days, but it's not exactly in low demand.
I'd wonder why they dropped it, but at a guess, it's some combination of low demand (first they make it non-required, then students who don't realize the broader applicability stop taking it) and higher cost (you need to hire one or more models).