[porker]

> Why is it all or nothing?

Erm, because that's the impression I've got from the tutorials and demos. I guess a "Add $Framework to a bit of your app" isnt' sexy: the ones I've seen add their own routing and focus on SPAs. Rather than "Here's some incredibly complicated information to display, and we need to be fairly interactive over it (and how other data on the page affects it)".

Would it work if you didn't have a vanilla JS application but a traditional web app?

[kej]

You're right that most tutorials dive in with both feet, but this is literally the very first text on https://facebook.github.io/react/

>Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.

[cornedor]

Facebook.com is afaik replacing small more and more small parts with react components