[weatherlite]

Elixir has a reputation for being relatively complicated and this (having to understand Erlang when developing in Elixir) is one of the reasons. Many CTO's don't want to touch it due to extra complexity, lack of devs etc etc. If concurrency is that important (it usually isn't but lets say it is) they can go with k8s - Node, Go etc (it doesn't really matter - k8s will quite easily scale just about any stack). There are just many easier paths of less resistance than Elixir in most cases.

Also - Elixir is functional or close to functional so it is quite a big mind shift so another hurdle to onboard newcomers.

Anyway, trying to increase a language's adoption is very very hard..