ZFS is still a little on the immature side; there are sufficient recently-fixed bugs involving data-loss that it is hard to be confident that there aren't others yet to be discovered.

That being said, I do use it on a laptop where losing the data wouldn't be a big deal, but having it easily compromised would be. It was just so much easier to transition to encrypted datasets; the whole thing was done with maybe 10 minutes of downtime.