It’s a matter of what works for you. I go back to the pre-DOS days of CP/M, so I have a lot of command line experience. Even the Linux crowd recognized they were never going to get any mainstream traction without a modern desktop environment. You can make a good argument that the command line can be more efficient, but I don’t like using it. Typing “copy c:oldfiles*.txt c:newfiles” is certainly faster than using Explorer, but maybe it’s the abstract vs. the feeling that you’re actually manipulating concrete objects that appeals to the GUI centric. At any rate, most people do seem to have a strong preference for one or the other.

“I suppose it's still widely used on the PC side to maintain compatibility with those who use Linux…”

You sound like a Mac person. Believe me, after all the ‘stupid “Windoze” user’ comments, no self-respecting Windows user is going out of their way to accommodate the penguins. In fact, we use folder names like “Microsoft .NET Framework 3.0” just to confuse and frustrate them ÷)
 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken