This is really just talking about which functions they decided to include in their standard library. Clojure for example takes the haskell approach so its not a

This is really just talking about which functions they decided to include in their standard library. Clojure for example takes the haskell approach so its not a question of composability vs monolith. Sure composability is nice and should probably be the way you start creating something but after you are satisfied that it works the way you want it to and you want to make it more efficient you will go monolith and treat this new thing as a bigger piece you can compose with. Someone new can the come along, fail to understand why its a monolith and decide to make it better my making it made up of composable parts again.