The static thing - I think its a reaction to the obvious inefficiency of dynamic pages, server processing for data that is only changed occasionally. Consider

The static thing - I think its a reaction to the obvious inefficiency of dynamic pages, server processing for data that is only changed occasionally. Consider a blog which gets posted to once a week. Do you really need dynamic processing for every page render 24/7/365? Well, that's the way it works. But you have to have something additional for changing data/separate API. You can do the static site, but you still gotta have the XHR or JSONP calls to fetch dynamic data. You get a nice separation of UI/data, easier to tweak the UI - independent of the data (hand it off to a designer), and your separate data server can feed multiple apps or you open it up for the world to use.