React components in ReasonML even have a reducer element that can eliminate the need for redux.

Despite being a completely different language Javascript programmer will find that the syntax of ReasonML has many familiarities with Javascript.

Reason includes true immutability, but it has escape hatches to let you use mutations in exceptional cases.

The same reasonml code can compile to js (eg. run on browsers or node.js, use any lib in npm), or compile to assembly through ocaml (unless of course you load js externals), running on any device, with C-comparable (or better) performance.

Reason was created by the creator of React, for developers already using JSX to template web or native UIs this is very familiar.