As others have pointed out, I think this claim of uptime is totally exaggerated. Manually making changes to per-application security settings often requires a r

As others have pointed out, I think this claim of uptime is totally exaggerated. Manually making changes to per-application security settings often requires a reboot, while if the same application requests changes programmatically, there's no reboot. Installing or uninstalling apps (from the App World) also often requires a reboot. Maybe for some devices deployed in a corporate IT setting (where these changes aren't allowed at all without an admin) the devices are stable, but for a regular consumer user, I don't think they would see very high uptime. (I also agree that they would largely not care about high uptime, however being constantly asked to reboot the phone is annoying, ie I think users probably start caring about uptime only when it's LOW)