May I ask ... are you trying to be professional, or merely provocative?
At the moment, I am responsible for one client system in Python, two client systems in PHP, and one in Java ... with a couple of Perl clients currently-happy and requiring no work right now. Over the past three decades, I’ve done extensive work in about two dozen languages. I don’t think about it much anymore: I have a hat-rack and change hats all day long.
Therefore, I think I am missing your point here. Programming languages are tools. Any comment made about the relevance of an index should be taken as relevant and considered, even if you don’t see why. And so on. Many folks from time to time “see the light” about whatever-it- is-today language, this “light-bulb” being that every other language (and every old-phart who dares to profess knowledge of it) must be C7007355. Hang around this biz long enough and, I assure you, you will see this very thing many dozens of times. (Especially if there is a University nearby.)
You merely stir up a tempest in a tea-pot, and to what end? There are many languages in my tool-box. During the course of any given week, I flip at-will between several. And so does, I daresay, everybody else here (or anywhere).