Without a doubt theres aircraft and other machinery our govt has that blows anything we know about out of the water, hell the F22? i belive was started something like 20-30 years ago, was still classified as in “testing” in early 2000 and is just over the past few years considered full service IIRC
Now I doubt that these planes we have that were built/designed over 20-30 years ago are the best of the best. I"m sure we have some planes that only fly at night and do some crazy shit that we won’t know about for another 20 years