No real disagreements about any of this actually -- I was always working more on Windows for pragmatic reasons (the jobs were there) than any sort of belief that it was always better technology (it frequently isn't)

One observations about Powershell -- it is as much a Perl (which I have exposure to) or Python (which I don't) targeted specifically for Windows as it is one of the unix command line shells.

And really, the virtues of a UNIX operating system are irrelevant if they don't have the Windows-specific application software that you are using.