I've used both Elixir and Erlang, but as eropple said about other languages, I feel they solve different problems from Ruby. It's also no way near as mature/pop

I've used both Elixir and Erlang, but as eropple said about other languages, I feel they solve different problems from Ruby. It's also no way near as mature/popular, so a lot of things you may need to write yourself instead of using an off the shelf gem.