Saleforce's problem is that its presentation layer is a giant pile of legacy code, which can be fundamentally changed, because there's a gazillion extensions and customisations that rely on it working the way it currently does. Having worked a bit with it, there's absolutely nothing about it that "benefits" developers, anymore than having to maintain a VB6 app "benefits" developers.

Done right, a modern web app should be better for both developers and users. The one benefit of the crazy shit described in the article is that if you don't weigh down your page with a multiple MB of ad-network and analytics scripts, then it can be incredibly fast.