It's doubly curious that there hasn't been a recent resurgence. I'd expect that the WFH trend would be making it more practical and sustainable for many.
During polyphasic experiments in my youth, my biggest obstacle was always securing reliable conditions to allow the daytime naps.
It’s a good article, especially in the second half where the two theories are synthesized into a narrow, compatible summary, but the clickbait title isn’t compelling and I don’t think really describes the content.
https://hn.algolia.com/?q=polyphasic