The problem with node is that if you switch from something like Rails to node you'll also need to switch to an entirely different architecture. While there are

The problem with node is that if you switch from something like Rails to node you'll also need to switch to an entirely different architecture. While there are some Rails-like frameworks for node (e.g. Sails), node simply lends itself to a more service-oriented architecture, with lots of much smaller, much more specialised applications rather than one big monolithic MVC behemoth. IOW, if you were able to replace your node app with Rails, you probably were trying to build a Rails app in the first place. Otherwise you'd probably have used something more like Sinatra.