Valuetypes has been on the roadmap forever, meanwhile they put in the effort and bought out greenthreads out of retirement as virtual threads.
Even if they started properly on valuetypes today, it's probably still a 10 year slog to get the ecosystem to follow.
Value types are a work in progress. It won't be (another) 10 years. Give it a few more releases.
FWIW virtual threads are great this time around. That’s something whose time has come generally.
But yeah for me Java took a big leap forward when it got lambda but there hasn’t been another big leap since. Still so many obvious features and sugar to add to file off the sharp edges and remnants of enterpriseness.