Except I am not. What would be Erlang really without OTP? Would you really want to implement all the building blocks in every new project? You are dismissing the importance behind stdlib while defending a language that is known specially because of its standard library (Erlang/OTP).

Also rebar3 is pretty much the same in scope as Mix (elixir tool). Which proves the point you are criticizing Elixir while using the same criteria to praise Erlang.

I am not saying Elixir is better or worse, just pointing you are extremely biased in your comments.