I explained "
Any appreciable amount data should never be lost. That is what backups are for.
The ability to get snapshots without shutting down the fs is a very important widget in the fs toolset. I find it geekily exciting[for lack of better phrase] that such a great tool will be available for OSS. One cannot, should not, rely upon any other means than a backup to protect data. All the other methods are there, IMHO, to keep from having to restore data because restoration does not always go as planned and backups are only as good as the last backup set.