[Amezarak]

I had specifically Powershell in mind, which is object-oriented and absolutely can be used interactively.

> It can be something that complements GUI administration, but can never possibly supplant it,

There are probably tens of thousands of people whose daily lived experience is that command-line administration of GUI desktops is all they've ever needed and yes, in fact, totally supplants the alternative. I am really struggling with this thread; it's my impression that you've a very narrow view of what people are doing with their computers.