The fifth thesis of The Generalist Manifesto is an economic one, and the arithmetic of breadth is simply this: the price of acquiring and exercising a new competence has collapsed. The machine now does the rote labour that once forced any ambitious project to be carved up across a team. Subtract that labour and the team is no longer the unit of work. One person is.
So the sums that justified specialising have quietly inverted. When breadth was dear, the rational worker dug a single well and stayed in it. When breadth is cheap, the optimal shape of a worker widens, because the marginal field is almost free to reach.
The whole-stack human stops being a fantasy and becomes routine — not a heroic feat but a Tuesday. What the machine cannot supply is the judgment for which fields to braid, nor the mastery of beginning that turns a cheap field into a real one.