This is the sort of thing that will have a LARGE impact on the ecosystem for updating from one JDK to the next. One of the big headaches we see with moving up

This is the sort of thing that will have a LARGE impact on the ecosystem for updating from one JDK to the next. One of the big headaches we see with moving up JDK version is bytecode generation/manipulation libraries choking on newer versions of the JDK. It's generally a simple update, but sometimes it's not (for example, when someone is shading asm). Having bytecode generation as part of the JDK will mean all libraries, including asm, can migrate to that and benefit from a perpetually supported API that updates as the JDK does. This is probably 80% of the headaches I've experienced going from the likes of Java 11 to 17 and 17 to 21.