Forget making more copies of the ill-conceived Zumwalt. That thing belongs in the same display case with the city softball shorts worn by the White Sox in the 70’s.
If war comes, and I believe it will be a naval war, we will need every hull we can send into harms way. We will need the ships and men to fight them. We will be turning yachts into gunboats. cruise ships into troop carriers, container ships into carriers (Drones & helicopters), and museum pieces into seagoing ships. The war be US vs Red China. With Japan and India playing a role (maybe Russia will join with China?) England and France will stay neutral—is my guess.