Meh. I just don't believe that it is not performative and about "the hour metric" when on second read, I read the phrase about the really unsustainable thint being when you reached the "140 hours". In the last few WEEKS, plural.

4 hours sleep. Every day. And working non stop.

You can pretend all you want but for all that is holy stop giving this bullshit snake oil advice.

You don't have a life and neglect your family. They better enjoy those extra millions and buy themselves a father and a husband.