Reasonably sure given US RoE vs Iran has been extremely permissive, even more permissiveness just means depleting highend munitions faster for same marginal effect. reality is US simply doesn't have the standoff stockpiles - US can go Vietnam / close air but then you'd be dealing with more down pilots and peanut gallery unavoidable. Given that VS PRC is forgone, ROE has nothing to do with fundamental US techstack/stockpile (mis)allocation. If US cannot defeat high end hypersonics at scale then expeditionary model with exquisite tooth/tail logistics cannot survive to reach theatre to deliver standoff munitions, and given most US standoff munitions subsonic, even if they could deliver theoretically they face near 100% interception rate. US would also have to retool basically entire delivery systems around supersonic munitions, which are more expensive, larger, i.e. reduced fire bandwidth. These are geometric not RoE constraints.