If you read how much Quartz Composer has been helping the Facebook design team, you might be less dismissive. With NoFlo we hope to bring that kind of collaboration to the web world.

https://medium.com/the-year-of-the-looking-glass/af182add5a2...

It's no secret that many of us on the Facebook Design team are avid users of QuartzComposer, a visual prototyping tool that lets you create hi-fidelity demos that look and feel like exactly what you want the end product to be. We’ve given a few talks on QC in the past, and its presence at Facebook (introduced by Mike Matas a few years back) has changed the way we design. Not only does QC make working with engineers much easier, it’s also incredibly effective at telling the story of a design.