People reducting Rails to a framework used to "generate HTML" like the author have a quite narrow vision of what Rails is capable of in 2015. It's perfectly pos

People reducting Rails to a framework used to "generate HTML" like the author have a quite narrow vision of what Rails is capable of in 2015. It's perfectly possible (and easy) to use it as the backend for an API and there have even been moves towards getting out of the classic HTTP request/response foundation of the framework (ActionCable, ActionController::Live to name a few).