> In elixir you really get the full power of multi core and support for distributed computing out of the box. Code that would have been beyond my pay grade or wouldn’t even imagine to write in Ruby or JavaScript is now easily reasoned about and maintained in projects.

One of the alternative languages you mention is single-threaded, and the other has a global interpreter lock (in its most common implementation). That Elixir is superior to them for parallel programming doesn't really say much.