No argument at all about the last sentence, but you should have skipped the first four lines as wildly premature optimization.<p>The vast majority of the world would be much better served by (to appropriate your jargon) a 2-1-1 rule, because it&#x27;s a straightforward treatment for a straightforward problem that is easily implemented.  Yes, &quot;format skew&quot; and double-failure of backup solutions does indeed happen, but at a much lower incidence than &quot;oh crap I deleted it!&quot;.