A mixed nuclear and conventional US carrier fleet

With hindsight, how should the United States have procured and refitted carriers around 1950?

The proposed fleet mixes nuclear ships with conventional carriers that can enter reserve, preserving surge capacity and access to more shipyards.

Nuclear carriers provide strategic endurance but cannot be cheaply laid up in the same way as conventional ships. The proposed fleet keeps roughly eight nuclear and four conventional carriers active with four more conventional hulls in reserve, reducing wartime stress and widening the industrial base able to support them.