3 things that I learned from Elixir and Clojure coding?

I have been coding in Elixir since 2017 and since January 2023 I am now coding in Clojure and Clojurescript. I will present your three important things that I am using everyday with this languages that I am trying to bring to some more conventional ones.

Avoid mutate data

Observe your program at runtime

Use function composition