Wait, is this true? I would have imagined unless it’s about porting software or testing it, everyone would be forced to use Windows.

If it is true, wonder what the proportion is then: 25%, 50%?

I don't mean this as a jab, but would you use Windows to develop software? Especially Windows that has AD teeth sunk into it where everything is "managed by your organization." It's just a thousand small cuts for seemingly no good reason.