We'd been using erlang and it was perfectly fine. Then we needed a REST API and I looked at how much work it would need to make it nice and chose Phoenix. For s

We'd been using erlang and it was perfectly fine. Then we needed a REST API and I looked at how much work it would need to make it nice and chose Phoenix. For some reasons I still wrote a lib that I'm calling in erlang and because of different string handling it's a bit of a pain. So for me at least, both have their strength but I wouldn't say you need Erlang, Elixir can work fine on its own.