Why is this technology on hold?
We have used Ember in the past at In The Pocket, but as we've shifted to more cross platform products, we now consider Ember a framework that does not fit in our modern, fast, maintainable and scaleable way of working.
React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.
Declarative views make your code more predictable and easier to debug.
Build encapsulated components that manage their own state, then compose them to make complex UIs.