Gleam is an interesting new functional programming language. It is an ML-family language with syntax very similar to Rust, but it's not a replacement.
If you like Rust and don't like Go (or Elixir's Ruby syntax), Gleam might be worth considering for I/O bound applications needing high concurrency.
Gleam can also replace Elm on the browser. Code written in Gleam is apparently 30% faster than hand-written JavaScript.

https://gleam.run

#Gleam#Elixir#Rust#FunctionalProgramming#FP