Joe Armstrong on Elixir (2018)

OTP is the core framework and main value proposition for both Elixir and Erlang. On the sidebar: Languages have their purposes and being a pure functional language reference design is not one of Elixir’s. Being a functional language is a means to an end in Elixir and Erlang, it’s not the reason they exist unlike Haskell.

Source: elixirforum.com