Sure, but one of those conventions and limitations is that the page is hosted by google. It's not something you can deploy on your own server. It's not as if it's just some list of recommendations that make sites faster - you're signing up to a Google service, and you're at their mercy from then on.
>It's not something you can deploy on your own server.
But you can. Often it doesn't matter because you aren't a globally distributed cache, but if you are cloudflare[1] (or apparently Microsoft[2]), you can and do.
