[D]There are no good programming languages for machine learning (except one day C# and/or Kotlin)

Hi everyone, I've been spending some time recently researching next generation languages to do machine learning in, and come to the conclusion that there aren't really any good options. I strongly suspect I'm wrong about my opinions below, and so I especially welcome anyone who has countering opinions to my own, especially if I'm just downright wrong --- I'd like to know. If you ask someone what the best programming language is, the chances are that they'll tell you that it depends what it's for --- they all have their strengths and weaknesses and quite naturally there's no programming language that is both good for data science and operating system design. When put like that, it seems like a natural thing: of course each language is a compromise, a heuristic to be optimised. If they're better for security, then naturally they'll be worse for something else.