Demo or it doesn’t exist
A year or two ago I read “Creative Selection,” [https://www.amazon.com/Creative-Selection-Inside-Apples-Process-ebook/dp/B079DVT6VP/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=&sr=] a book that gives some insight into how Apple operated internally during the “golden age” of Steve Jobs. It’s a worthwhile read