SIMD is being worked on as well: https://openjdk.java.net/jeps/338
See Project Panama for the encompassing project: https://openjdk.java.net/projects/panama/
AOT was available for over a DECADE with the GNU Compiler for Java before it was removed.
Re:Java Feature Spotlight: Text Blocks
by MaxBarraclough on Friday May 01, 2020 @01:09PM
(#23044198)
It's also long been possible with lesser-known proprietary solutions like Excelsior JET, so I suppose Java can claim to have a mature solution to that feature, just not a mature mainstream FOSS solution (not counting Graal).
For Async/await, I believe a much better approach is available with Quasar today or with Project Loom soon.
SIMD is an issue though if you need that.