This article could mostly be summarized as "invest in ONE language". The arguments for that language to be Java aren't very strong compared to the arguments for ONE language.
Between the two requirements, I think Java, C#, and TypeScript might be the only languages that qualify.
says jtolmar in a browser written in C++
Also, the way you phrased your comment is needlessly rude, to the point I almost didn't bother replying. If you actually want to learn why people have the opinions they do, you should consider being more polite.