[jackcviers3]

These things map/reduce/compose/flatmap are universal - they're in java, python, c#, Ocaml, Haskell, lisp, ruby, javascript...

Complaining about learning them is like complaining about for loops. They just exist.

Just because some are more familiar with for loops than map doesn't mean that more universal, immutable, expression - based solutions are not widely familiar and easy to understand to programmers coming from other languages.

Readability is subjective.