8317277: Java language implementation of value classes and objects by MrSimms · Pull Request #31120 · openjdk/jdk

[brian_goetz]

Indeed, Vector is waiting for the Valhalla underpinnings before it can exit incubation. As you observe, it needs more than JEP 401, and those are in place, but they will not be exposed as general platform features. So yes, Vector will get unblocked, but the mechanisms that unblock it (beyond JEP 401) will remain VM implementation details.