POSIX isn't divine and infallible. PowerShell is actually quite nice, save for the arcane Windows console UI. I still prefer zsh, but that's no reason to immediately discard a competitor.
I have a windows workstation. Every single server I interact with is POSIX. POSIX isn't divine and infallible and PowerShell is nice, but it isn't as ubiquitous and I only have enough patience for one arcane shell language.
