> The story for Crystal is the same story for many programming languages: grow the interest of users, and find generous funding.

it's the same thing for Elixir as well. they have successfully wooed a few Ruby programmers but not many have completely switched to using Elixir. Again some companies using Elixir are those that want to migrate away from Ruby.

it takes quite a while for a new hot language to become extremely popular and then go on to replace other popular mainstream languages.