I like that the article mentions Manfred von Thun, his iteration over FORTH was a joy to use, spent many hours writing code with it. It's a breeze. It was the true mirror reflection of Lisp in FORTH, and helps one reap the benefits of concatenation without getting bogged down in the nitty gritty details as one often ends up dealing with in FORTH, at least in the beginning until a mature vocabulary is built for the problem.
As I'm still so far behind in the LLM tech in terms of how it works, so I don't know what to think of this article, but my experience with using them as a user to generate FORTH code was often a failure. They just can't get it right, most likely due to lack of training data. OTOH, I also found writing FORTH as a human way more difficult than any other language I used, even more so than hand written assembly. But it amortizes itself fairly quickly, and things get a lot easier after a point (what I called earlier as vocabulary maturity). But more importantly writing FORTH code is way more fun and satisfying to me somehow.