That is a bit reductive. You can consider these implementations in other languages: https://github.com/hypirion/haskell-transducers -- https://github.com/ruuda/transducers
Once I was building a declarative components library in PHP, using the ideas I've learned from free monads. I'm sure you can't imagine what an attrocity I've built. It did the job, but I had to mentally check out and throw in a couple of goto's in my main evalution loop.
All that to say that elegance of expressivity is tied to the syntax and semantics of languages.