It has virtual threads, that under most circumstances let you get away from the async model. It has records, that are data-first immutable classes, that can be

It has virtual threads, that under most circumstances let you get away from the async model. It has records, that are data-first immutable classes, that can be defined in a single line, with sane equals toString and hash. It has sealed classes as well, the latter two giving you product and sum types, with proper pattern matching. Also, a very wide-reaching standard library, good enough type system, and possibly the most advanced runtime with very good tooling.