If you're looking for a reason to migrate from a stack like Ruby/Rails to Elixir/Phoenix you should check out my RailsConf talk on that exact subject: https://www.youtube.com/watch?v=OxhTQdcieQE
Sometimes I find that having a detailed blog post about the subject with supporting links and documents can be a fantastic resource for transition discussions.
My team has made the decision to move toward all greenfield projects being started in Elixir/Phoenix and we couldn't be happier. We have been a Rails shop for six years prior.
Is it hard to find developers familiar with elixir/phoenix? Or is hiring RoR developers and training them to work on elixir/phoenix a better option than specifically hiring people familiar with elixir/phoenix?
Just curious to learn about your experience, as there is not much data available on hiring elixir/phoenix devs.
However, this does not make expert Elixir or Phoenix devs. Reading up and learning about OTP and how concurrency works in Elixir/Erlang is necessary to continue to advance.