We're generally not as publicly chatty as developers, and don't tend to do Windows platform admin as a hobby. We have varying levels of programming experience.
For us, PowerShell has been nothing short of miraculous, though some people are put off by anything that's not a GUI. It's a shallow initial learning curve and easy enough for semi-automating some very repetitive user management tasks. The more skilled scripters can switch pretty easily into C# once they need the performance, because they already understand the .Net framework from mucking around with it in PowerShell.
And if you're ever at a small conference where Jeffrey Snover is speaking, say hi - he's generally eager to talk with PowerShell users.
The PS and WSL story seemed like they tried to do better but gave up.
But what can I say, I'm no Windows guy, just talking from an outside view :)
The PowerShell story is pretty simple: a cross-platform, object oriented shell. Having used it, I attempted to locate a similar Linux solution, to no avail. I'm tired of cutting text and object translation makes my life a great deal more straightforward.
As for WSFL, it seems "Windows can run everything. Docket support is stellar" is a much more likely story than "we gave up and are slowly becoming Linux with a GUI".
I like Bash but writing anything remotely complex in it is... not recommended
Yes, it's very popular with Windows sysadmins, which is more or less who it was designed for.
This included the object-oriented nature of PowerShell. The ones who have fully accepted that it is a command line wrapper for .Net like it way better than they did when they were trying to use it as a crappy version of bash.
I, on the other hand, routinely astound them with my ignorance about the brave new world of build tools that assume that you have constant access to the internet (among many other points of my ignorance).
I'm now trying to get re-accustomed to Unix-style command line tools, and it's irritating as anything not to be able to ().somepropertyname to get exactly what I want :)
It hasn't really taken off outside of Windows. Unless you're in a mostly Windows environment, PowerShell on the Mac or on Linux doesn't make a lot of sense.
Was this difference so good that it was incorporated on other platforms?
I really liked the idea of the PowerShell, but somehow it felt to me that it never really became "a thing" and the Windows Subsystem for Linux move from MS felt like they gave up on the whole shell thing in the end. :\