[sancarn]

> At least I have yet to see one that is actually useful in the sense of a generic (or even a single-purpose-built) language

Yeah as said, https://github.com/enso-org/enso seems to be a general purpose functional programming language with visual editor, but otherwise I haven't really seen any no-code solutions worth their salt. I'm not particularly a fan of enso either, but it's the best I've seen.