> - 1970s: abstracted away the algorithm -> OOP, standard libraries, UML

Which was mostly a failure, to the point that there is a major movement towards languages that "abstract away" (in this sense) less, e.g. Rust.

Certainly if the creators of UML are saying that AI is great, that gives me more confidence than ever that it's bunk.

UML was for various reasons, but libraries? When's the last time you wrote a sorting algorithm? The entire software ecosystem runs on dependencies. That failed?

Rust uses crates to import those dependencies, which was one of its biggest innovations.