The capabilities actually used were and are a real overkill, for many orders of magnitude.
The whole think tanks and whole branches of military from the start worked on many order of magnitudes multiplied assumptions of the military capability of the opponents. Only now you can read their acknowledgment that the estimates were hugely overblown (1). So they did produce overkill from the start as they produced "enough" rockets and planes. Then they replaced the plain nuclear warheads with the thermonuclear warheads, again many orders of magnitude overkill. And the "victory" is defined as destroying more than the opponent, no matter if anybody would be able to live in the world afterwards. Against the fact that the world was never so interdependent as it is now -- if you would remove all the stuff from your possession where at least some parts were produced in e.g. Asia, you would not have almost anything useful.
We're still in the world that can lose the form as we know it in just one erroneous decision, even if some humans in some caves/shelters manage to survive, what's left will be worse than the most pessimistic movies. And in that world, just the cost of a single type of the plane (F-35) is projected (that means lower than what will be) to 1.508 trillion dollars. And the US just exited one nuclear arm control treaty.
1) E.g. in my favorite book: "The Doomsday Machine -- Confessions of a Nuclear War Planner" written by a former strategic analyst at the RAND Corporation.