What are they selling, exactly? Why does this need to be a framework, with js and all that?<p>I&#x27;m not asking cynically, and following it up with &quot;oh, they should just do x instead&quot;.... I <i>legitimately</i> do not understand what&#x27;s going on here. What&#x27;s the added functionality? I read the article twice, I don&#x27;t get it. I&#x27;m going through the spec, I don&#x27;t get it. I looked at the article source, I <i>really</i> don&#x27;t get it, it&#x27;s just html and common sense.