To me he sounds like a Unix guy from the 80's who is still bitter that their hayday of charging whatever they wanted to run the computers is no longer there.
Unix was replaced by windows as mainstream servers because they are cheaper to maintain and buy. Either that or the CIOs and CFOs in the world's largest companies are really really stupid (and I doubt that many people in that high of a position are stuipd).
Exactly correct, I transferred many expensive and difficult Unix servers to cheaper and easier Windows boxes back almost 15 years ago now. We didn't even need to read the documentation, it was so easy, I am not kidding, on the fileservers the hardest part was typing in the usernames and passwords.