Sorry, it didn't seem like you were aware of them from the post above. There are plenty of reasons to stay with Windows, Linux lacking enterprise management tools just isn't one of them.
People don't generally care which OS they use as long as they can get their job done. We had one sub-division entirely on an immutable Linux desktop, another media unit was all-in on Apple products. As you say though, they're outliers - simple inertia will keep people with Windows for a long time to come, their dominant position ensures it.
The cost vs complexity argument isn't a compelling one either - there's a reason so little of the internet runs on Windows.