I'm not sure how much of it is, either, but honestly, I'd like the option to NOT run system updates sometimes. I know you need them, but my phone always installs them at the weirdest, least convenient times. It decided to do a major update in the FREAKING MIDDLE OF A MARATHON. I was using my phone + Fitbit to keep an eye on my pace so the phone going offline for 20 minutes to piddle around with that was irritating.