Also sometime back there use to be OpenJDK maxine VM project which is gone and now an option of closed source SubstrateVM appeared. It may be unlikely but Orac

Also sometime back there use to be OpenJDK maxine VM project which is gone and now an option of closed source SubstrateVM appeared. It may be unlikely but Oracle can simply remove highly paid staff from above mentioned projects and put in some closed source alternative/analogous projects. Open source project may then be left to rot. As it is almost every single developer on Graal etc is Oracle labs or Oracle funded research group at university.