Upvote for the Chuck Norris joke. But in all seriousness, very useful. If I understand correctly, this can be used to put all your home-made shell scripts on Github, and then install them on all your Macs using Homebrew. That's really cool because in that case, there's no longer any difference between all the regular tools (ImageMagick, wget, exiftool, pngquant, etc) and your own stuff.