A related question: is his advice helpful for startup founders? From my brief understanding of his work, it seems like it could be relevant to later-stage found

A related question: is his advice helpful for startup founders? From my brief understanding of his work, it seems like it could be relevant to later-stage founders, who are not wearing quite as many hats on a daily basis, but would be less relevant for early-stage founders. But I'd be interested to know if anyone here has applied his advice in an early-stage context and found it helpful.