Or apparently the even more common functional list operations: “map”, “for_each”, “filter”, “every”, etc.

Well, unless your language is "go" in which case it converges on no good package management and no functional filter/map/reduce functions

Literally the worst thing about that language. Such a common operation, and every time it comes up I end up iterating over ranges like a caveman.

and yet has beyond healthy adoption rate, go figure :)

Though I don't quite like the part about package managers. The more of them is language specific, the more entrenched in the language development is, the more difficult is to develop multilingual code, and the more projects depend on random stuff from the internets for no good reason, like in the infamous left-pad farce.