Nice. So for example, it looks like Kotlin already has a nearly identical feature at the language level, which will be optimizable when Valhalla ships: https://

Nice. So for example, it looks like Kotlin already has a nearly identical feature at the language level, which will be optimizable when Valhalla ships: https://github.com/Kotlin/KEEP/blob/master/notes/value-classes.md https://github.com/Kotlin/KEEP/blob/master/notes/value-class... > In the future, in a Valhalla-capable JVM, JVM primitive classes will enable efficient representation of Kotlin value classes with an arbitrary number of underlying fields on JVM.