You should probably RTFA before making broad assumptions on their solution and how it works. Most of what you wrote is both incorrect and addressed in the article.
The only thing in my comment that’s not directly based on the article is a handwavy 1ms/request saving estimate, and since they don’t provide any measurement, it’s anyone’s guess.
The guideline specifically advises to do what GP did: Instead of commenting whether or not someone read the article, to tell them that article answers their questions.