I think cheap missiles and drones changed a lot of things. One could see this in Ukraine; more recently in Iran. USA is primarily focusing on heavy impact and expensive wars. This may be a more effective strategy, but it does not seem to be very realistic. I can't help but feel that this is especially much the case with regard to Iran, because the USA, despite what the orange bolo is saying, does not seem to be that eager to intensify the war (e. g. no ground invasion - and that's very telling if you remember the Iraq or Afghanistan invasion).