I understand the article comes from scala-academy, but I think by offering a more objective viewpoint of different languages and the standards they impose, scala can show what niche they provide. I don't believe it is the niche of "Everyone is hiring a Scala programmer", but it should be (quoted from the article) "...implicits, underscore notation, flexible imports, multiple classes per file, multi-line strings, pattern matching, traits with variables, etc." If this article was about these points, with relations to other languages, that could be some quality content!
For everything else, either the article misrepresented other languages, or simply remained apathetic to their application.