Don't let your experience with Ruby colour your opinion of Elixir. Elixir's similarity to Ruby (and Phoenix's to Rails) is hugely overstated.

I wrote a long Reddit post about that[0], but for the tl;dr you can ask José Valim himself: https://news.ycombinator.com/item?id=36604054

[0] https://old.reddit.com/r/elixir/comments/1ipyi81/why_should_...