This is a subjective matter, I suppose. I can see your point about Go. As a counterpoint, looking back on projects my team has worked on, I can't say we've re

This is a subjective matter, I suppose. I can see your point about Go. As a counterpoint, looking back on projects my team has worked on, I can't say we've reaped a great deal of net gains from leveraging the more mature Ruby or Python ecosystems, especially as compared to a modern JVM stack. Sure, sometimes we find a library that claims to address our need, but we often find the library doesn't do what we need precisely, is incompatible with something else we're using (e.g., JRuby), or whatever. The quality is all over the map. Net efficiency seems like a wash in my experience. But YMMV is always applicable with developer efficiency.