It's entirely possible everything added since it was acquired by Sun is *STILL* ...

tw04 on Sept 3, 2017 | parent | context | favorite | on: “Oracle laid off all Solaris tech staff in a class...

It's entirely possible everything added since it was acquired by Sun is STILL under an open source license. Just because they haven't released the code or provided it to end-users under that license says nothing about how it's structured internally.