Do not trust anyone whose only apparent output is producing PKM-related content. They are trying to sell you the PKM fantasy.
Of those who do produce something genuinely valuable with the help of PKM, do not believe that simply doing PKM will make you that kind of person. Just because an essayist uses PKM, don't think learning
A Signalling Theory of PKMThe reason Knowledge Graphs and other PKM memes are so trendy is that, by publicizing one’s overwrought Knowledge Management System, people think they are showing off their big brains. Perhaps for some people, it sincerely feels like intellectual progress to externalize one’s overgrown web of ideas and one’s arcane system... See more
But Feynman’s brilliance was not solely due to his natural cognitive abilities. He relied on a method : a simple technique for seeing the world through the lens of open-ended questions, which he called his “favorite problems.”