Elixir has been around for 12 years now and still hasn't gained any meaningful traction.
The risk of using Elixir vastly out ways the benefits today if you are trying to build a product.
There is a reason why almost every product today is built using JS and Python because it easy to find developers, it's easy to find everything you need, almost every service supports it and there are tons of resources for it.
We switched for Elixir to JS and we only have to maintain the app itself. We have hundreds of OSS helping maintain the libraries we use most of them working for companies that the libraries are for. That's the massive advantage of using popular languages that everyone uses.
Elixir is a fun language but that's about it.