I think I'm missing something. I see how this would be great when it's build time but during development I don't want to have to keep running build commands each time I want to use a new package I'm development. Using Grunt and Bower may be a little time consuming up front but once things are set up its very easy to keep a separate Dev and prod environment in sync between different contributors. I only see the value at build time with Duo which is why I'm sure I missed something.