The apples one is LLM nonsense: the left example doesn’t include any code for the loop, whereas the streams version actually is iterating over a collection.

Regardless, FP-style code isn’t “shiny new stuff”—it’s been around for decades in languages like Lisp or Haskell. Functional programming is just as theoretically “fundamental” as imperative programming. (Not to mention that, these days, not even C corresponds that closely to what’s actually going on in hardware.)