You must know more about UCLASS than the Navy.  It is so "successful" that the Navy abandoned plans to use it as a strike fighter and instead are using it only as a tanker.  Landing on a carrier was a baby step.  Despite it's shortcomings, now all of a sudden it's good enough to conduct one of the most difficult missions - electronic warfare - all by itself?  This is a mission that requires a highly trained electronic warfare officer to decipher the electromagnetic spectrum that is flooded with radio waves and try to find a small hostile source, then potentially engage it.  We want to trust an autonomous machine with the ability to kill?  When the Russians invaded Ukraine, one of the first things the US discovered was that the Russians have a very advanced electronic warfare ability and rendered many UAVs useless.  So I don't believe that the death of manned aircraft is near.  The F-35 may be the last manned aircraft (highly doubt it), but the future is not here yet.