You must be young. There was a time when Closure was the most used library for minification. Before that it was the YUI Compressor. Anyways, Node came out and Uglify worked with Node and Closure didn&#x27;t and even though Closure had some benefits like dead code elimination (which was eventually added to Uglify but not sure if as good or not - regardless it wasn&#x27;t there at first) Uglify still won out.