"Oh there's a folder icon" (click)

"Oh there's an entry called My PC" (click)

"Aha, there's my disk and little bar showing the free space"

It's two clicks if you have your wits about you, maybe a few more if its not that obvious.

I don't know why you singled out Windows. It's just as easy in Gnome or KDE etc - the point here is that CLIs can never be as intuitive as GUIs. As the original article said - Humans are very visual people. Seeing things in a visual space is much easier for us.

Further, Windows will pop up a notification that your disk space is running low, and this opens another window with suggestions for different types of files (temporary update files, temporary internet files, recycle bin, installed programs) that can be removed to release space.

Ubuntu does warnings for low disk space too.

Personally I think the experience is very similar for noobs.

Press windows key, type "space". First item is "Storage". Press enter or click it, you see a prominent progress bar like thing and text: "300GB used, 164GB free".

Click on My PC. The answer is there on the disk icons.

But then again, why wouldn't the Linux guy search google in the first place?

Or if it is a total newbie, look for the disk icons, the information is there as well.