Kotlin made the worst mistake here. At least Scala actually gives you ways to do error handling somewhat ergonomically with for comprehensions. Kotlin gives us

Kotlin made the worst mistake here. At least Scala actually gives you ways to do error handling somewhat ergonomically with for comprehensions. Kotlin gives us nothing. Sure, you're "supposed" to return sealed classes and match on them. But it's so tedious and non-obvious that I've literally never seen it done in any Kotlin code I've depended on.