You're joking, right? That's read-only.

Beggars can't be choosers ;)

Windows is notorious for supporting fewer filesystems than its Unix-like peers; I'm not sure why you seem surprised that ZFS would be an exception.

I'm not surprised. I'm just saying that your link is unhelpful.

Edit: It's not the state of the art of ZFS on windows either, which would probably be a virtual machine.

It's the best that's available for it right now; if that's not helpful, I'm not really sure what is. That is, unless you were expecting me to write a Windows ZFS driver with read/write capabilities myself and provide a link to that ;)

I run a virtual machine exported over samba for ZFS, I think that's much better than a read-only version.

But if you're going to give a link to something that doesn't meet basic requirements, say so. Otherwise it looks like you're disagreeing with the claimed lack of windows support.