We can assume each Gulf nation has about 1,000 each. Bahrain less. Putting total number across those states and Israel to 3,000-4,000 interceptors. Probably 30-40% are reserved for high quality infrastructure military and economic. 60% may be used for general purpose. Still means Iran is close to 25% of depleting those resources in my estimates. 1,000 more missiles will mean they will start to spread thin, and another 1,000 stuff would start getting in quite easily. At that point US and Israeli terrorism tactics of targeting civilians will come into play.
