Earlier quoted context omitted.
Maybe for web applications . There should be something in the license of JavaScript frameworks & libraries to prevent them from being used in blogs, newspapers, trade publications etc :-/ For now all innovations in JS just seems to provide us with even heavier web sites for no real benefits. I feel I'm starting to dislike JS the way I disliked Flash which would be quite a feat.
I think it's completely fine to write a website/blog/newspaper in React, provided you make it isomorphic and keep it as light as possible. Then you get all of the advantages of using React with almost none of the disadvantages. Of course, nobody does this in practice.
(Oh, BTW, JavaZone 2016 was Oracle-free and all talks seems to have been uploaded to vimeo with no restrictions on downloading.)