Honest question, going back to Java, dont you miss scope functions (let, apply, also, etc)? Extension functions? Using sealed classes and "when"? I am happy to

Honest question, going back to Java, dont you miss scope functions (let, apply, also, etc)? Extension functions? Using sealed classes and "when"? I am happy to see Java (and the JVM) improve but it still seems to be missing some of Kotlin's best language features.