That is incorrect. JVMCI is still in OpenJDK and is the only thing required to run Graal. You need to put Graal as jar from Maven on the upgrade-module-path sin

That is incorrect. JVMCI is still in OpenJDK and is the only thing required to run Graal. You need to put Graal as jar from Maven on the upgrade-module-path since JEP 410 since it's no longer there by default but this is the only thing that changed. So you can continue to use Graal as your last tier compiler or to compile Truffle languages on OpenJDK.