This discussion of backup strategy has overlooked an important point, namely that Rita is considering upgrading to Mt. Lion with a view towards possibly reverting to Lion, and if she does decide to revert she'll need a Lion recovery partition (in lieu of an install disc), so how does she perpetuate hers?
And more important, will she even be able to restore Lion after having upgraded, or will the App Store have pegged her Mac pegged at Mt. Lion, costing her the ability to revert via that avenue?
