Some of us do, but we've given up trying to expose HN to the shell. The anti-Microsoft culture that built up in the late 1990s and early 2000s has too much inertia on HN to overcome by occasional articles.
Keep in mind that much of what seemingly makes Powershell so great on Windows is inapplicable in a Unix shell environment. So there's still some juvenile "M$ hyuck hycuk" nonsense, but there's also some pretty spot-on discussion of the difficulty of trying to move tools between very different systems.
As your emphasizing comment embodies, that culture is still strong, and seems incorrigible. Microsoft are The Unredeemable. Even their current era of open sourcing isn't enough to wash away the sins of the past executives.
On a more topical note, one of the limitations of Powershell is it can only do basic math and (obviously) basic Algebra. To extend this, you can invoke .NET from the command line. Try these: