Fist, it adds more moving parts, making the system more likely to contain a hole, which might be just enough for NSA. Second, consider that typical buyer is a beauracracy, and they are are either buying a crypto system, or the are not buying it. The upgrade might be trivial for you, but a beauracrat has no way of knowing that, so he has to play by the rules.
I think they key to scale of the word system is however big it needs to be to establish actual security. You can have perfectly good crypto, but if you're relying on certificate authorities you may be safe from street hackers, but as far as NSA is concerned its wide open.
It's just reading tea leaves, of course. I imagine that NSA is not enjoying reading thousands of applications from iOS app devs like me, so if they keep doing it they must be getting something for their effort.
I think they key to scale of the word system is however big it needs to be to establish actual security. You can have perfectly good crypto, but if you're relying on certificate authorities you may be safe from street hackers, but as far as NSA is concerned its wide open.
It's just reading tea leaves, of course. I imagine that NSA is not enjoying reading thousands of applications from iOS app devs like me, so if they keep doing it they must be getting something for their effort.