Elixir saves Pinterest $2M a year in server costs
My problem with Elixir is that the syntax is too noisy:    defmodule Math do
        def sum(a, b) do
            a+b
        end
    end

Compare that with Python:    def sum(a, b):
        return a+b

Having the name of the file be the name of the module and whitespace defining the blocks is the perfect approach for me.