Let's not forget Grape either: https://github.com/intridea/grape https://github.com/intridea/grape You could see this move towards JSON APIs way back in 2012 a

Let's not forget Grape either: https://github.com/intridea/grape https://github.com/intridea/grape You could see this move towards JSON APIs way back in 2012 as I suggested here: http://paulbjensen.co.uk/posts/2012/07/11/thoughts-on-rails-node-and-the-web-apps-of-today http://paulbjensen.co.uk/posts/2012/07/11/thoughts-on-rails-.... Some poo-pooed the notion, but you can clearly see that the popularity of realtime frameworks and the way that apps are built client-side heavy is pulling Rails in this direction. Performance is still the key factor here, and I suspect that's half the reason why you've got some people who espoused Ruby in the past now playing with other languages beginning with Ru, but that have a much less friendly syntax compared to Ruby. Some welcome changes though nonetheless, especially on the WebSockets front.