Re: He's right
Unsustainable? The present (apart from the current unpleasantness) model of the huge agglomeration of work places drawing in commuters from a thousand square miles or so is utterly unsustainable. This might be enough to start it toppling.
The ultimate solution could be WAT ("at" and "from" are two quite different propositions). It could be some form of dispersed office system - multiple small offices housing a few employees living locally. It could be rent-a-desk in local shared office spaces. It could, and probably will, be a mixture.
Whatever it is the big city has reached its unsustainable limits. Its end must be in sight.