@lproven I don't understand the comment that it will "eventually" be in FreeBSD, too -- if someone wanted to try OpenZFS 2.3 in FreeBSD I'd suggest grabbing the latest snapshot release from https://www.freebsd.org/snapshots/. How does one try it on Ubuntu or Void Linux?
The @FreeBSDFoundation invested a lot of money to develop RAID-Z expansion so I'm very happy that it's finally in an OpenZFS release.