I agree, also I personally prefer the idea of having things separate, HTML for the structure, CSS for the style, and JavaScript for the behavior. You can create very clean and neat pages like that especially if you don't mix each technology e.g. keep everything separate in different files..

I am however open to new ways of doing things so I will keep an eye on this, but I must admit, that index page looks a lot more daunting to edit than a normal HTML page, especially if you are not familiar with JavaScript.