well they launched 180 missiles and 80% got through. which means if they launch 1800 next time 98% will get through. (except that there's evidence that they hit some of israel's arrow missile systems in their first attack). that's the beauty of saturation attacks. everything after the saturation point is a hit. basically iran would utterly dismember israel's military and economic capabilities. they were reluctant to launch at first because the outcome was uncertain since this type of saturation conventional ballistic missile strike had never been done before. and now they know it's extremely effective. they won't hesitate the fire in the future.
Canada