How much of this actually has to do with using the language? Unless the companies are solving very specific technical problems that Erlang/Elixir are designed t

How much of this actually has to do with using the language? Unless the companies are solving very specific technical problems that Erlang/Elixir are designed to solve, what really matters is productive software devs and managers, and that is more defined by expertise and domain knowledge in a particular language than the language itself (within reason: you're not going to choose C over Ruby for a web app backend). How much of this is due to (the minority of) devs that can code Erlang/Elixir being more experienced/productive regardless of the language? Or just having good tech management?