I watch this and wonder whether at some point the US may suddenly discover their legacy navy is obsoleted by new drone technologies. 

For example, if Iran and their allies decided a year or two ago that an attack from the US was worth preparing for, could they position a large swarm of drones in a convenient land (or sea?) based location near enough to where they expect the aircraft carrier strike groups to base themselves, then launch a few thousand drones at once to take out the only few missile defence systems that can catch hypersonic missiles reliably, then immediately follow up with a barrage of hypersonic missiles that had been kept in reserve for just such an occasion.