We use Elixir, and basically every developer we’ve hired has had zero Elixir experience prior to joining our team. Like any language it takes some time to get up to speed with the ins and outs, but I’d rather have a good developer with no Elixir experience than a mediocre-to-poor developer well versed in the language.

I can’t speak for any other company, but I suspect that any team that has made the decision to use Elixir is (a) well aware of the low market penetration it has, and (b) not screening out resumes based on inexperience with the language.

Edit: I should add that, despite all of that, I think it’s a fun language and any developer would probably enjoy dabbling in it regardless of vocational prospects.