It's not XML though, it's HTML. HTML with additional nodes for layout, class names, etc. If you're not invalidating the cached code multiple times per day (whi

It's not XML though, it's HTML. HTML with additional nodes for layout, class names, etc. If you're not invalidating the cached code multiple times per day (which, in fairness, a lot of the stuff from Google, Facebook, etc probably are), an SPA should use less data over time than a comparable server rendered app. The initial outlay is bigger, but once it's cached you only need the raw data as you navigate around.