I tell them the truth: I wanna go deep in my stack (Ruby) to the point of learning C and VMs to understand how the Ruby interpreter works. This is what interest

I tell them the truth: I wanna go deep in my stack (Ruby) to the point of learning C and VMs to understand how the Ruby interpreter works. This is what interests me; I really can't see how learning Node or Elixir is gonna make a better programmer than what I want to do.