[ljm]

I was going to go as far as saying that elixir itself is the ‘killer app’. It doesn’t make you an Erlang developer but it is also arguable that knowing Rails isn’t necessarily sufficient to fully grok Ruby. You’ll still make some headway though.

I’ve interviewed plenty of people who cut their teeth on Rails and fall apart as soon as you present them, say, Sinatra. Or a gem that provides an API client. Once it comes to writing non-Rails code (with all the helpers and the magic), it’s as good as learning a new language that happens to look exactly the same.