That does leave the question of why this idea has started to take off more recently. Part of the answer is certainly that Rich Hickey, disgracefully, set the ball rolling in this direction, and that many others have welcomed it as one weird trick and one pat answer for all the worsening problems of developer burnout. Unfortunately it seems hard to dismiss the idea that it's also social breakdown driven by a broader trend, as over time we move further and further from the pre-'60s "neurotic society" of people obsessed with duty and social conformity (often with oppressive or destructive results, to be sure) into the "psychopathic society" in which even people who don't themselves merit a Cluster B diagnosis have internalised narcissistic and psychopathic attitudes.

Sure (this is demonstrated in the linked video, for instance) but the ZXCV group is pretty similar in that respect. Even for operations which involve the mouse it's preferable to drag only one hand far away from its home position, rather than both of them. (Especially since the video evidence https://www.youtube.com/watch?v=Cn4vC80Pv6Q seems to suggest that Star users tended to move their left hand only after making the mouse selection, instead of prepositioning it.) And the Star's Undo key, which presumably doesn't require help from mouse input and is likely to be needed after a non-mouse action, isn't placed any more conveniently near the home row: it's simply in the right side-cluster rather than the left one.