I personally believe sleep research is at the same stage as the food pyramid was in the 80s. As someone who is also currently doing sleep trials for our start-

I personally believe sleep research is at the same stage as the food pyramid was in the 80s. As someone who is also currently doing sleep trials for our start-up (https://soundmind.co https://soundmind.co), I can understand why. Clinical sleep trials are time consuming and expensive. Try getting a volunteer to sleep in a lab for more than a few nights, then try to get thousands of people doing that, like you would in a drug trial, also try to factor in all the things that person would have done that day which would affect their sleep, as well as factoring in what their sleep was like the previous 3 or more nights, and how that would affect on going sleep. When I read Why We Sleep, I remember thinking that the conclusions Dr Walker was arriving at seemed wrong much of the time, and seemed sensationalist. At the same time, I've seen him interviewed where he walks back things like the link between circadian rhythm and blue-light. I'm not sure if the expectation is that he writes a rebuttal to his own work, or a living document about how the science has changed? I think we need to look at the emerging field and understand that sleep is still something we don't understand well, and that much of the research is still a moving target.