I don't see them at odds. They are mutually complementary. You can go very far with a fantastic dynamic language like Elixir. The loosely shaped data that bombard your app from the net is a perfect fit for a dynamic language. And the OTP concurrency / parallelism approach as well: you can have an actor per connection (while languages like Python and Ruby and PHP have struggled with thread pools and dynamic limits for ages).

I am starting to love Rust but again, I don't see it as a competition to Elixir.