This war is not ceasing anytime soon
I don't think it can go the way it's going thought. You need weapons and they are almost depleted. Even with missiles still stashed away, you need sites to launch them and they are very little still operational. So what would happen when they all gone and most of the Islamic army leadership neutralized?
It's not Iran only, there are other nations: China, Russia, and Pakistan. Maybe there missiles are in the depletion phase; however, when one compare everything with the economical lense, USrael, both has suffered more. Of course Gulf states too. For Iran, the war is more psychological; the more they can hold, the more they are putting pressure. Iran is/was already sanctioned, so they are used to it. One more thing, they have already neutralized the top-tier of IRGC - even the supreme leader - yet no significant change. The offenders forgot to read the history as well as their present status. Even if they kill the new supreme leader, nothing will change at all. They are the one who love death as much as life.
That's all good and well. But how will you fight a war with no missiles? You can't throw soldiers across the sea. Is like being on a shootout and running out of ammo. Just because you still have will there is nothing you can do.
If this was a boxing match, imagine the opponent is still standing but he can't see because of the bulge of his eyes, heavy breathing from a damaged rib, completely exhausted and partially knocked out. Even if you still have will. There is nothing much you can do. Iran without missiles to launch will be a very hard war to continue.