The fundamental issue with ZFS encryption is that the primary developer that created it is no longer contributing significantly to the project. It's good code,

The fundamental issue with ZFS encryption is that the primary developer that created it is no longer contributing significantly to the project. It's good code, with good tests, but it's not getting any additional love. The utilities and tooling surrounding encryption are also weak, and there are ways you can throw away critical, invisible keydata without realizing it, and no tool to allow the correction of the issue, even if you have the missing keydata on another system.