It was partial, but IIRC Arch Linux made the switch to get rid of at least some of the directories previously: https://archlinux.org/news/binaries-move-to-usrbin-requiring...

Edit: Oh haha, this article was posted 13 years ago and there was a similar thread which is how I dug up that link... https://news.ycombinator.com/item?id=5944594