And to complement the other comments, the ZFS developers quit Oracle when it was made proprietary and moved on to work on OpenZFS, which has continued evolving.

And to complement the other comments, the ZFS developers quit Oracle when it was made proprietary and moved on to work on OpenZFS, which has continued evolving. Talk by Bryan Cantrill https://www.youtube.com/watch?v=-zRN7XLCRhc https://www.youtube.com/watch?v=-zRN7XLCRhc 44:16 "[paraphrasing Bryan C.] I told Oracle management if they changed the license, the core ZFS would quit. And they lost all the ZFS team."