I have found this blog to be one of the best for learning. I was working at Roche when they acquired Genentech, and and was part of the application rationalization exercise! Mehmet would have Likely been a part of the many calls I participated in! Small world!
https://www.salesforceben.com/the-decisions-or-myths-behind-salesforce-features-and-the-lessons-learned-from-them/