Does the author not respect the Programming Language subreddit as a platform to discuss these things? Sure, it’s weirdly vacant most of the time but the space is there and ready to be used.

I know that Wikipedia is a very just-so community, whose rules I do not comprehend. Yet when I hear that a programming language with a decade of development, and "dozens" of companies using, it isn't worthy of an article, my mind goes to INTERCAL.

I mention INTERCAL to someone, at some point, about 2 or 3 times per year. By my own estimation, it is historically noteworthy. However, is it more deserving of space on Wikipedia than this Odin language, which I know almost about, but which has current applications and is in active use?

I don't have an answer to that question, but that is what comes to mind.

One of the problems with notability standards on Wikipedia is that, when an article which doesn't meet the notability standards slips through the cracks, it's unlikely to ever get deleted.

The result of this is that there are a lot of articles on Wikipedia which don't follow its own notability rules. This can be confusing and frustrating for people - like, what do you mean the Idris programming language has a Wikipedia article and Odin doesn't? Who even uses Idris?

But the reality is that, the "Idris" article also doesn't meet notability. One day someone decided to write it, and the simple fact is nobody noticed that it wasn't notable, so it stayed. But someone happened to be around to notice the writing of "Odin" and delete it.