It's an improvement, but not much of one.
Also, consider the aftermath of nuclear war. Consider how many people live in cities. Consider that cities are not at all equipped to survive without massive, and consistent shipments of food, water, and electricity.
Is it?
They didn't update for 30 years after all, and conventional smart weapons evolved a great lot in the same period. Nukes are almost not needed for counterforce (almost, because area targets such as sub bases and mobile ICBM garrisons are still better attacked with airburst nukes, but these are so low number it will be inconsequental from humanitarian or environmental standpoint).