That is an interesting read, although everyone seemed to be slightly hostile instead of openly discussing. I don't prefer J, even over APL; I find it not very well designed as a tool of thought. I do like some k's though; they more naturally feel like an ascii version of k. I think Arthur has a better feel for the ergonomics of verbose languages. I like BQN so far, but need to do something large-ish with it. I also like Klong, especially because Nils wrote a nice and easy to follow book about it. But it's not really a language with a community.

I think anyone interested in this kind of thing should just intern one of them ; you basically need so see every compute problem as an array problem and immediately see patterns for how to solve them. The 'gibberish' (as programmers not used to these kind of languages see it) is typically not written char for char, but the experienced programmer has idioms; when they encounter a problem seen before, an entire 'function' plops out, often shorter than a function performing the same task in another programming language would be name. Once there, the other ones are kind of more of the same. It's not very different from the first encounter with haskell or lisp or something; if you are not proficient, you won't see the advantage (or even think people using it are not totally sane).