Rust is interesting to me but honestly, I'm going to stick to elixir because I have high confidence I can train juniors to code safely on it, and I have no particular need for performance (most of my stuff is iO or network bound)

Write NIFs in Rust, or C if you want to stay on the BEAM, and still get performance if you need it. Elixir/Phoenix are the Ruby/Rails of today. I do like getting low-level within the same PL, so this has truly inspired me to dig more into Rust. I am still playing with Zig though.