Immutability is a big one, and I absolutely love things like Elixir's pattern matching and pipe operator, I'll never program the same after coming into contact

Immutability is a big one, and I absolutely love things like Elixir's pattern matching and pipe operator, I'll never program the same after coming into contact with them. And I love never really needing to write a loop or to have a "counter" variable, the declarative style just makes things much easier to read, write, and understand imho.