I mostly agree with your points except to say that, even if Oracle is not active in the project, the risk is real as long as Oracle owns any of the copyright fo

I mostly agree with your points except to say that, even if Oracle is not active in the project, the risk is real as long as Oracle owns any of the copyright for any ZFS code. The USL vs BSDi litigation over BSD ultimately came down to a handful of source files out of 18000. ( https://en.m.wikipedia.org/wiki/History_of_the_Berkeley_Software_Distribution https://en.m.wikipedia.org/wiki/History_of_the_Berkeley_Soft... ) I wouldn't talk badly against ZFS, but I would not roll any dice with Oracle as a copyright holder.