I came back to this article again, and actually, I'm now reconsidering my initial reaction. While it does contain a few abrasive or seemingly unsubstantiated statements, the article does make valid points about the suitability of JavaScript for "serious software engineering".

There's a recent article describing how a company was basically forced to migrate from Node.js to Go, due to the architectural limitations of the former: The Way of the Gopher (https://medium.com/@theflapjack103/the-way-of-the-gopher-669...). This was a convincing real-world example of how a JavaScript backend is not scaleable in some cases, with concrete data to back it up.