Iran’s missile inventory is about 3000, with an annual...

Iran’s missile inventory is about 3000, with an annual production capacity of a few hundreds. That’s I imagine the general consensus in the West. May not be accurate. Iran can sustain a few weeks of missile attack at the present rate. That means if the conflict drags out, other players will have to step in to supply arms or support production - Pakistan, Russia, China. That’ll be when the countries begin taking side, and the conflict expands in the region imho. Rumours are Pakistan already agreed to supply Iran with missiles. Some in Iran argue it should step up the attacks (in terms of number of missiles) without considering the inventory, suggesting a week of intensive attacks can reestablish deterrence and force Israel to end the war earlier.

Israel is not in any better position either. It just cannot sustain an intensive air campaign 2000km away for more than a few weeks. That’s a struggle even for a superpower. So it is currently focusing on short but intensive strikes. Again, if things drag out longer than a few weeks EU and US will inevitably get dragged in as Israel would need support.