From the post: "Homebrew helps you compile different kinds of software on your mac, making it feel almost as easy as apt-get'ing a package on e.g. ubuntu. " (emphasis added) This is something I've noticed from using both OSX and Linux for the past few years — unless software is available as a drop-and-install package, it's universally _easier_ to install in Linux* than it is in OSX. Given the market for OSX and the a…
Unless the package is not in the repositories or you want to have an instance with some different flags. One of the really nice things of Homebrew is that besides being a package manager, it is a great /usr/local manager.
For instance, installing something that is not in Homebrew is as simple as setting the prefix to /usr/local/Cellar/whatever/version and then running brew link whatever and it puts symbolic links in /usr/local. Want to make it 'invisible'? Just do a brew unlink whatever
It's also much easier to maintain your own Homebrew repos (taps) than e.g. maintaining an Ubuntu PPA.