[Skinney]

We actually do have react in production as well. The header on our website is a react component, and our app is written in react-native. We also tried out flow for a while.

Elm compiles faster, has better error messages, is a simpler language (so our apps tend to stay simple, so easier to pick up again after some time) and has less churn.

We have experience with other technologies, we just find Elm better :)