Excited for the release, but disappointed in the embracing of OO programming in Javascript. Object oriented programming is a poor way to express logic and gets away from the beauty of languages like Javascript (and Perl) - functional composition.
I deeply regret the day when all job postings for Javascript say "Looking for an object-oriented Javascript developer", since like lemmings companies think object-oriented programming is a good thing.
All the React code I've written tends to be much more functional/declarative in nature than OO. When writing web frontend code, there is the giant blob of state known as the DOM that has to be dealt with in some way. More than anything else, React allows you to treat the view as "create a function that transforms data into DOM elements", handling the state diffs itself.
I deeply regret the day when all job postings for Javascript say "Looking for an object-oriented Javascript developer", since like lemmings companies think object-oriented programming is a good thing.