Aren’t they? Changing a legacy app can take years to do the needed research, approval, procurement, and implementation. “Because my IT guy doesn’t like Windows” is a terrible reason to undergo that process.
The same with retraining users on a whole new OS. You’ll spend hours over the course of months answering “where did my C:\ drive go?”. That’s a lot of time you’ll never get back.
Active Directory provides a lot of tools that are familiar to senior techs and easy enough for junior techs to figure out. I might prefer how Salt Stack works but I don’t have time to train dozens of fellow techs.
Linux is cool for a number of reasons, but it isn’t a magic easy button and a wise admin doesn’t swap out fundamental parts of his tech stack without careful consideration.
Yeah, but the it’s a good rule anyway, for some of the same reasons as the “Don’t put it in an email if you wouldn’t want it read aloud in a deposition” rule.