PowerShell has been around since 2006, not just the past 3 or 4 years. And there was a good deal of CLI-based administration / scripting before then, too.

The default fallback to can't find it in GUI is cmd? Windows 95 used to start from command prompt. We've been administering windows from cli for 30 years. But our cli was oo from the start. Powershell is really amazing. Once you start falling out of object land into crap like ssh, you see the split, e.g. why it took so God damn long to port it. And I still have plink into switches using a premade command file.

In many ways it's much better. There is a consistent interface over everything. Whereas on my Unix boxes my ~/.ssh/config file looks completely different to my Apache config.

Also I get much more fine grained control over permissions in the registry, right down to individual keys. Try doing that when your config is in a text file.