Very interested. Mostly working in Elixir, but very interested in idiomatic ways of using messages, supervisors, genservers, etc etc. Haven't yet had a chance to scale beyond a single server, but would love to learn about that as well.
I've gotten into Erlang because of Elixir. I didn't realise any other systems people cared about syntax design before. I'd love to learn anything about FP or using patterns from dist systems / telco worlds to scale web apps using Elixir / Phoenix.