Ok I'm being slightly paranoid maybe. I have an iPad Air 2 and the single Lightning connector seems great... ...but, with the rMB, there seems to be a potential issue in that if the USB socket wears, goes intermittent, or worse still, fails, you might be left with a few hours power (at best) to get your stuff sorted before failure and a trip to the repair facility (and no MacBook!) Not being a laptop owner (yet!), does this concern anyone? Owners, how solid does that socket seem? I assume MagSafe on traditional laptops is much better in this regard?