It's no wonder that Apple is becoming increasingly pushy about updates on iOS. I've noticed in the last few months that the new pop-up options are to either "remind me later" (and it absolutely will) or "update now."

I think a huge part of it is trying to stay ahead of this security curve.

Exploits are going to continue to be found in older versions of iOS (and every other piece of software, for that matter). It's kind of disheartening to think that if the authorities just hold your phone long enough, they'll eventually have an exploit to unlock it with.