[syshum]

In mixed enviroments being able to use Powershell on both Linux and Windows allows for people to only have to learn one scripting environment, and allow you to share functions, modules, and tooling between the systems.

that alone is a big WIN for PS imo

Also I find Powershell to be more enjoyable to use (I like the verbosity, the help system, and passing objects instead of text streams.. I know I am crazy), and easier to train new Admins on PS than bash or python.