I see a lot of comments here using the terms ZFS and Open ZFS interchangeably. But to my understanding, these are 2 different things. - ZFS is the very stable, non open source project that only works on BSD. - Open ZFS is an effort to rewrite ZFS in a totally open and free format that now runs on Linux. This was the idea I had, but I might be incorrect.
Talk by Bryan Cantrill 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."