The point is that if you need granular partial refreshment, your javascript needs to be a lot more smart, like what to do when add/update/remove a comment - tha

The point is that if you need granular partial refreshment, your javascript needs to be a lot more smart, like what to do when add/update/remove a comment - that is you end-up writing view logic both client-side and server-side. As stated in the article, the view logic needs access to both server-side data and client-side DOM, where it resides depends on which side the view logic requires more communication. The argument is that if you rethink HTML, then most web app should be designed in a way so that UI interaction significantly improves the UX. That's why we need client-side MV* to be an enabler for such re-thinking.