“Rails 5.0 is approaching, bringing with it niceties for websockets, backend-only API servers, and revamping the command layer. Version 4.0 brought turbolinks, russian-doll caching, the queue API, and a host of improvements. All of these, except maybe turbolinks, were great new features but did not fundamentally alter the way applications are built in Rails…”

Phoenix is Rails 5 by Ken Miller