I think you might be missing the point, though! The main tradeoff of Rails is that it comes with that default setup in-place, and for most modern apps that will

I think you might be missing the point, though! The main tradeoff of Rails is that it comes with that default setup in-place, and for most modern apps that will include Javascript. The defaults are there for a quick-start, and can easily be removed if you want to use a different approach.