I've tried out a number of new-fangled languages from a web development perspective (Rust, Go with gorilla, primarily) and in my opinion don't really provide the same set of tools for this sort of web development as higher-level languages like python, ruby, js w/node. That's not to say they don't have important use cases, they just aren't designed with this sort of web development in mind.

And of course, it's totally valid to prefer the different paradigm that these provide! Hasn't been ideal for me, though.

Services though? Totally an appropriate time to fire up Go, in my opinion.

And, even then, Python (which I'm most familiar with) has downsides for JSON services. Translating from an ORM (sqlalchemy) to formatted JSON is something you have to relegate to some magical methods or do one by one, neither is a great solution.