I very much agree with this. While it's definitely fun to build apps in Node, especially when you need one really simple thing to happen with enormous capacity in terms of requests per second, I prefer to build my backend in Rails and frontend in Ember.js, because I feel JavaScript is best used as a frontend language, and Rails is really great at making RESTful APIs as well as encapsulating business logic far away from the JS frontend app. I much prefer writing Ruby rather than JavaScript, but I appreciate JS and know it well enough to do a good job.
And rails is particularly better/easier to implement a backend in than NodeJS + crudify/restify/express, or any number of other tools?
I've not used anything that allows for as easy modularity as node+npm lend themselves to... just because it's JS doesn't mean it's spaghetti that has blurry code sharing between the client and server.. it's not all meteor, even if that does have a lot to offer.
