During a recent developer meetup in my country, I went to an elixir workshop where the host (an independent consultant) confided in us that several of her main clients had asked her to not reveal that they use elixir - they're apparently so happy with their choice that they treat it as a competitive advantage and claim to use a different stack when asked by competitors.

I can't know for sure if she was bluffing, but the idea really was interesting enough to make me wonder.

Edit: sorry, this was supposed to be a top level comment.