As a python programmer for over 15 years, you will be better served by learning a PL from a different paradigm * Erlang/Elixir -- concurrency * OCaml/Haskell

As a python programmer for over 15 years, you will be better served by learning a PL from a different paradigm * Erlang/Elixir -- concurrency * OCaml/Haskell -- static typing etc., * Typescript/Elm/Purescript -- better Javascript * You get the idea ... more so than Ruby. Ruby lives in the same neighbourhood in the galaxy of programming languages. You are not missing much by ignoring Ruby.