To be clear, I have no stake in which tools you use to satisfy your clients' needs. I think it's great that Node and JavaScript work well for you, but you do compare Rails and JS/Node on this 'coolness' axis:

I also think that the [JavaScript] community is going through a "cool" phase, similar to what happened to Rails in the early days...[A]s Rails matured, it lost it's cool factor and the community stabilised.