That's a lot a bandwidth for a single thing. Makes me wonder, perhaps we should have a global repository of popular web libraries for browsers, all of them versioned, like happens on npm/bower. It's possible be backwards compatible with old browsers using a real and standardized URL. A single source of the truth. It's better than many CDNs providing the same thing over and over again... Being immutable packages browsers do not need check for updates (no more waste with 304 responses).