I don't get your point. This is what JEP says:

- "Improve startup and warmup time by making optimized native code for an application instantly available when the HotSpot Java Virtual Machine starts."

- "If the workload changes in production, regenerate native code dynamically for continued peak performance, providing the best of both ahead-of-time (AOT) and just-in-time (JIT) compilation."

- "Ensure that shifting from AOT-compiled code to JIT-compiled code is invisible to applications."

That is JEP544 doesn't substitute JVM and JIT optimizations. It just changes the nature of the JIT's outcome.