Comment by cshenoy

Not trying to defend anyone here but I think you're making the wrong comparison. React (the library) isn't changing. Just like Elixir, JavaScript (the language) is changing for the better and almost everything is backward compatible. What folks are upset with here is react-router, an optional, third party routing library dependent on React. Authors should be allowed to improve their own projects otherwise they become stagnant as the libraries and languages they depend on evolve. It's why semver exists.