Disagree: ZFS is show stopped by unimportable pools, which currently are probably usually recoverable if someone could do the work to fix that use case (still iffy).
I've had a ZFS volume get very thoroughly trashed though by bad writes and still been able to recover data from it (back in the foolish days before ZFS-on-Linux when I had OpenSolaris in a VirtualBox VM with real disks, and something happened that randomly nuked blocks all over one of the filesystems. Interestingly: just the one FS. I had a whole bunch and others were untouched).
If metadata is corrupted to a point where pool can't be imported, you probably won't save much from it and shouldve had a backup anyway.
You might want to recover at least some files from a badly damaged FS if it is your home server with a baby photos, but would you really do that, if it was accounting of your company and not restore from a backup instead?
