My wife and I have identical MBAirs, except that I got mine when it was shipping with Mavericks and she got Yosemite. I get about twice the batter life, and a l

My wife and I have identical MBAirs, except that I got mine when it was shipping with Mavericks and she got Yosemite. I get about twice the batter life, and a lot less trouble with Pages/Numbers. I'm thinking of wiping hers and installing from TimeMachine, then pulling in just her user data.