This gets posted since 2018, but it is sadly still not for general use, both due to crashes and data safety issues. I wish this would get more love - especially since ReFS development on Microsoft's part is very slow, and seemingly no priority.

A warning poem. Very nice.

I have been a huge ZFS fan since the Solaris days and have had a bad experience with btrfs, yet I’d be remiss if I didn’t point out that (the last time I dove into it) the btrfs for Windows project was in a better and more useable shape than the ZFS for Windows one.

I still dream that this will one day be useable. ReFS has a few interesting ZFS ideas, Windows Storage Spaces incorporates yet some more, but fails to do so in a way that actually gives the sysadmin any confidence or visibility into the underlying layout and misses out on a whole lot of zpool goodness.

already tested 2 years ago, quite nice

As a huge ZFS fan, this looks promising. There's little documentation on it. Not sure it needs much, but I'm curious how they do things like malloc()ing the ARC and how it might interfere with memory pressure in windows. They also seem to have rewritten the "zfs mount" command in this latest build, which is a release candidate. So it seems like fun awaits, just not a place to store your most valuable pr0n. :)