Have you ever tried Kotlin? For non-system-level stuff on the JVM, it's IMO a direct upgrade to Java. `value class` for type aliases, `when`, and better null ha

Have you ever tried Kotlin? For non-system-level stuff on the JVM, it's IMO a direct upgrade to Java. `value class` for type aliases, `when`, and better null handling. But then, modern Java is doing all that stuff too, I hear.