As huge fan of the Elixir language I think this article missed the point.
Elixir is gaining popularity _because_ of the Erlang VM and libraries. Yes, macros, protocols, syntax, etc may attract a first glance at the language, but I believe people stay and evangelize Elixir because of the power of Erlang/OTP.
Likewise, I think Elixir popularity will only drive Erlang, Joxa, and LFE popularity forward as the initial roadblock of grokking the Erlang VM and how OTP works are overcome.