In the corporate world ecosystem and fungibility of programmers are the top priority. The only way Elixir will get traction there is by Elixir companies literally growing to Fortune 500 size and showing the language/ecosystem is viable at that scale. Even then I doubt the advantages of Elixir will move the needle for that type of company because once you scale up the challenge is 99% people, teams, and communication; the elegance and efficiency of the code and ops don't matter much in those types of environments.