Ruby pry brings a lot of those conveniences that I think really hard to live without. There is a presentation[1] when Conrad Irwin shows what is possible.
Elixir is an involving platform and community. Think about the Ruby community from years ago, a lot of things are missing, but there is a lot of potentials as well. From my side, I started to see Elixir seriously 5 years ago when I need to maintain a big SaaS rails codebase, and in order to support the increasing quantity of users, I need to throw more powerful and expensive machines, and it was hurting us at that time, and after some POCs, we perceived that it would be really interesting to rewrite some parts of our application in Elixir with Phoenix. I think that it's an important tool to have at hand, something that you can reach if needed.