The article discounts dynamic FP languages that most real world delivered FP code is written in (Erlang/Elixir, Clojure, etc). The claimed "the top dozen functional-programming languages" list is also missing Scala, Ocaml/ReasonML, etc.
I can understand wanting to focus on your preferred FP subdisciplines (statically typed purely functional languages) but it seems eliding any mention of this will be confusing the readership since IEEE Spectrum is targeted at a general engineering audience.
I can understand wanting to focus on your preferred FP subdisciplines (statically typed purely functional languages) but it seems eliding any mention of this will be confusing the readership since IEEE Spectrum is targeted at a general engineering audience.