It's a neat trick using the Browser's Quirks Mode to load JSON that can bootstrap a framework, I'm not sure I really understand the benefit though. In order to actually get to the point of bootstrapping, the server has already transferred all of the content, plus the bootstrapping Javascript in a single payload. It seems like this implementation has the weaknesses of using a Javascript framework, without the benefits. Together with all of the weaknesses of static content, without the benefits. All the while depending on a quirk of the browser for support, which not all browsers may support.