Guzey updated changed his mind on this topic: https://guzey.com/2022-lessons/#get-minimum-possible-sustain...
It's unfortunate that he hasn't added a disclaimer to the original post since it is shared so widely.
EDIT: fixing autocorrect
It's unfortunate that he hasn't added a disclaimer to the original post since it is shared so widely.
EDIT: fixing autocorrect
EDIT: Did he really change his mind? Still seems like he thinks that book is pseudoscience, just that sleep is more important than he originally gave it credit for.