While I also love many things about Kotlin, the one thing that always sticks out like a sour thumb is error handling.

While Javas checked exceptions had a lot of problems, at least there was a way to declare the output (errors are ouput) of a function on a type system level.

With Kotlin, that's just gone. You can fiddle with Result type (or make your own), but you lose a lot of the ease of "bubbling up" errors.

How do you handle errors? (I wished Kotlin had error handling like Rust, which is the best that exists, imho)