you can install bash on windows too.

I don't think powershell is even the powershell of windows. You get some of the better sysadmins using it, but working in the c#/windows world I see developers rarely touching powershell, certainly nowhere near as often as you'll see Linux develops writing a shell script. I wouldn't be surprised if C# was more used for "scripting" purposes than powershell, it usually ends up shorter and more readable anyway.