> I think his fears have come true to some extent in iOS, but knowing what we know now about government surveillance of everybody, it may no longer seem like too great a price to pay.

We're already paying that price, essentially. An iPhone won't run arbitrary code, a replacement OS, or accept code from arbitrary sources. It's already an exclusively vendor-curated platform. If you're already going to buy into that model, I don't see the point in not going for the greatest amount of protection that you can get. (OK, yes, a dev can compile their own code and push it to their own device. I'm actually not sure why I don't hear about this happening more often as a way to run "unacceptable" programs on iOS devices).