Loom and Valhalla both seem to be very powerful new features for the JVM that seem to take forever to land.

Valhalla was first announced in 2014, and Loom in 2017.

Does anyone have some insight on when either of these might finally be ready?

For those not familiar:

Valhalla: introduces "inline types" (structs) and allows using primitive types as generics. Has the potential for quite significant performance improvements because it can reduces all the pointer chasing currently required.

Loom: allows Java to work like Go: code that looks single-threaded but where IO is actually driven by a runtime on a hand full of threads. As in: async without the development and debugging complexity.