It is certainly THE question of the day, and I’m afraid the most likely answer is, Iran may be stronger than we realize.
However the war power of a country is also tied to who they are allied with militarily. That raises the question then of how much are Russia and China involved in this decision? Both of those countries have been somewhat allies of Iran, especially Russia of course, but they have both had growing ties with Israel recently as well.
They will both probably act distant to all parties today, but should it escalate…
Iran now states its military action has concluded. It sounds like this was just a quid pro quo for the attack on its Embassy in Syria. Iran has no stomach for escalation, but Israel has the final say.
Russia would certainly benefit from the attack in the form of increased oil prices.