Recently, I've been doing a lot of Go (Golang) development. For me, it's sort of the anti-Ruby-Rails. I really like the fact that it requires me to "roll my own" in so many situations. I need to understand what's happening under the hood to make things work.
But, the abstraction/magic of Rails is useful. Speed to market with trustable, battle tested magic is a profitable proposition.
I want to introduce Golang into my current project, but I haven't quite found the right place for it yet. Rails makes it so much easier and faster to add functionality at our scale.