Built ships beat perfect designs left on paper

The closing rule behind Japan's Cold War fleet growth is practical: buy a useful ship, keep it operating, and improve it when resources permit. The first version may fall short of the theoretical ideal, but a physical hull provides capability and experience that a perfect paper design cannot. Ongoing construction also gives yards, suppliers, and crews a base from which later classes can improve. The final prompt asks viewers to apply that Japanese pattern to another country and consider how its costs, fleet, and industrial position might differ after decades of iterative production.