This is true, probably fine for smaller use cases. I cannot imagine doing a production Elixir app without node networking (I do quite a few things with it), and

This is true, probably fine for smaller use cases. I cannot imagine doing a production Elixir app without node networking (I do quite a few things with it), and that is a deal-breaker for me on Heroku. That's really the only deal-breaker though. Docker for Heroku makes it really easy to ship artifacts rather than source which I think is important as well.