That's not true at all. You need some way of interacting with a back end (as well as the browser.) Whether that's via forms or AJAX requests, you need more from

That's not true at all. You need some way of interacting with a back end (as well as the browser.) Whether that's via forms or AJAX requests, you need more from the DOM. The DOM is not just a GUI toolkit. I am not splitting hairs, you are glossing over serious limitations to this approach.