My understanding is the part of OpenJDK Zing is based on is entirely owned by Oracle, so they can give Azul a license for it. Oracle could not do that for all

My understanding is the part of OpenJDK Zing is based on is entirely owned by Oracle, so they can give Azul a license for it. Oracle could not do that for all of OpenJDK today unless OpenJDL has a super weird CLA that signs away ownership of the code because they do not own all of the code.