To be fair on 10, both OS X and Windows got that from earlier predecessors. And for 7, I'm pretty sure I remember System 7 and earlier having single Preferences folders, just like Windows 95's Control Panels. No idea which came first, but it's a pretty obvious idea once you strap a GUI on top of a config file. I'd be astonished if there wasn't a similar idea in every single GUI environment out there.