Honestly I wouldn't be using Elixir if it wasn't for my co-founder's singing the praises of Phoenix & Liveview. I'd tried it once about a year ago but couldn't see any advantage over Clojure (esp. with re-frame). Sadly he was never going to move to Clojure.

That said, now I've dug in and really used it for solving some problems I am finding it an elegant and enjoyable experience.

I'd happily use either although I think Elixir has a particular fit to web applications.