How future proof is the iPad Air 2? I'd like to buy my mom one for her birthday because she has an old iPad 2 right now that she's had for 5 years and its practically unusable. She doesn't buy herself new tech items because she's scared she'll lose everything when she gets a new device (getting her to upgrade from her iPhone 4S to an iPhone 6 was quite a challenge). So I'd like to buy her something that will last her at least another 5-6 years before another hardware update is needed. She uses the iPad very lightly, Facebook, web browsing, occasional PDF viewing and printing. The iPad 2 is just very slow and laggy at this point, but it still does what she wants it to do fine. This would be her main computing device. Any help or advice on how long it could last and whether it's a good investment or if it's better to wait for an iPad update would be greatly appreciated.