I have oar's taken daily of all my regions (with content - I dont do this for ocean regions), and IARs every week.  OFC My IARs are just for my very limited local account users (as my grid doesnt have public registration).  I also have an rsync of my assets updated daily as well as copies of my grid structure.  It's not perfect but I can restore my grid to the last day if I need to.  The biggest issues is restoring OARs where there are items owned by non-local users.   It cant usually resolve those users so they get owned by "me" when I need to do this so these are "emergency" OARs - I do not intend to ever "revert" to them etc.
I agree though - while I dont need to manually do mine anymore (I just check they are working) - its a relief to know you are as prepared as you can be.				
				
				
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