Comment by aidenn0

Since the plural of anecdote is data, I'll provide mine here. ZFS is the only file-system from which I've lost data on hardware that was functioning properly, though that does come with a caveat.

Twice btrfs ended up in a non-mountable situation, but both times it was due to a known issue and #btrfs on freenode was able to walk me through getting it working again.

With ZFS, I neded up in a non-mountable system, and the response in both #zfs and #zfsonlinux to me posting the error message were, "that sucks, hope you had backups." Since I both had backups and it was my laptop 2000 miles from home that was my only computing device, I didn't dig deeper to see if I could discover the problem. FWIW, I've been using ZFS on that same hardware for almost 2 years since with no issues.