I definitely agree with 1/, yet I was more referring to more advanced functionalities (but I do agree that the "foundations" of Elixir are very strong and I think it will ultimately be a large factor of its success).

2/ Did you mean "Elixir has access to Erlang ..." rather than "Node...", I assume?

I'm well aware of that (I also use Java libraries quite a lot with JRuby etc, similarly), yet having worked with Erlang developers (in polyglot apps), I still personally find that there is more choice for me in both Node & Rubygems, compared to raw Erlang, at least for the topics we had to cover.

Well - I guess it depends on what your actual needs are, YMMV!