Only because I've read this story more than a few times before? See: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
>Oracle could relicense ZFS at any time, or make an explicit statement about its legal status. They have not done so after 10 years.
Any legal difficulty remains from the GPL side, and no suit has been brought in the years upon years of the GPL hair shirts screaming about non-compliance. Unfortunately, the GPL hair shirts don't have much (any) credibility on the subject of what the GPL means.
Bring the suit or STFU. I have no patience for armchair legal opinions from people who won't put their money where their mouth is. Stop spreading legal FUD!