Question: Is it possible to uglify all the RequireJS modules without concatenating them into a single file? (I know the other way round is possible with `optimize: "none"`).

Answer: 
From the description of [material design specs](https://www.google.com/design/spec/components/grid-lists.html#):

> 
> Grid Lists are an alternative to standard list views. Grid lists are
>  distinct from grids used for layouts and other visual presentations.
> 
> 
> 

If you are looking for a much lightweight Grid component library, I'm using [React-Flexbox-Grid](http://roylee0704.github.io/react-flexbox-grid/), the implementation of `flexboxgrid.css` in React.

On top of that, [React-Flexbox-Grid](http://roylee0704.github.io/react-flexbox-grid/) played nicely with both [material-ui](https://github.com/callemall/material-ui), and [react-toolbox](https://github.com/react-toolbox/react-toolbox) (the alternative material design implementation).
The way I do is go to <http://getbootstrap.com/customize/> and only check "grid system" to download. There are `bootstrap-theme.css` and `bootstrap.css` in downloaded files, and I only need the latter. 

In this way, I can use the grid system of Bootstrap, with everything else from Material UI.