It's also unfortunate that many iOS apps have totally neglected support for 4" devices and it's all too common to see apps in which the viewport is far too small due to other UI elements covering the screen (e.g. Uber and Google Maps).
I really would like to automate backup of every version of every app I own, so that I could pick and choose which to install. It seems pretty doable with just scripting, but haven't really explored it.