Hey Brock thanks for the thoughtful response. These studies have forever influenced design education and best practices. But you are right that many are dated and can't be relied upon over ux research or sometimes modern studies. For readers looking to learn more about Miller's Law for example, this is a great article on why Magical Number 7 is just an allegory https://uxdesign.cc/ux-myth-millers-law-the-magical-seven-was-only-an-allegory-6283505f758d