It's no longer considered premature optimization when you have 100,000 DOM elements on a page, like Facebook conceivably would. It's not surprising that this pr

It's no longer considered premature optimization when you have 100,000 DOM elements on a page, like Facebook conceivably would. It's not surprising that this project comes from them. Does a run-of-the-mill JS app require React? No, there are hundreds of alternatives from direct state mutators like jQuery, all the way through full MV* frameworks like Angular, Ember, Backbone, or newer. React is cool and innovative in its problem domain, but not all users of a technology will use it solely on its merits. This is frankly a risk with any 'popular' technology.