I have no idea how many missiles the US used during our "not touching you" with Iran before, but I would be floored were it a noticeable dent in storage I've irl seen. Even our *nuclear* air launched missiles--of which we have proportionately very much fewer than conventional missiles, of course--are around 5,000 in number (a public number) As has been noted above, they take time to make. Many haven't been made since the 80s, 90s--just maintained. But there are many. Vast amounts. Think truly movie spectacle sized floors.