It was left off the base load of the device so that it could be revved quicker. If there are bugs in an app store application you can push a fix, if there are

It was left off the base load of the device so that it could be revved quicker. If there are bugs in an app store application you can push a fix, if there are bugs in mobilesafari or the maps application the only way to update them is to cut a new release of the OS.