Tried Rust and was blown away by the incredible type system and brilliant safe memory management using ownership. Finally get all the hype around it.
As the title says, the type system of Rust is just incredible and it has the things I was interested in like union type, emums, Options, macros, borrow checkers, tuples and so much more. I finally get all the hype around it and it truly is a paradigm shift from existing languages.