The last time I needed to use fsck to repair a filesystem was less than six months ago. After running it I found that my entire directory hierarchy was garbage

The last time I needed to use fsck to repair a filesystem was less than six months ago. After running it I found that my entire directory hierarchy was garbage and lost+found had at least hundreds of files named by their inode numbers. It would have taken me forever to piece this back together if it was a filesystem that I cared about. This is consistent with my experience with fsck in decades past. In 15 years of using zfs, I’ve never lost a pool when it was in a mirror or raidz layout.