[nashashmi]

Imagine this: before serving the page, a filter seeks out the critical css, inserts it, and removes all css links. Greatly improving page load times and reducing CDN loads.

Edit: on second reading, it seems like you are saying when another page from the same server with the same style loads again, the css would have to be reloaded and This increases bandwidth in cases where a site visitor loads multiple pages. So yes it is optimum for conditions where the referrer is external to the site.