What a much larger US diesel-submarine fleet would require

How would Cold War US submarine operations change if every Tench, Balao, and Gato-class boat were modernized?

The Navy would have many more usable submarines than it needed day to day, so a large reserve or in-ordinary system would become central to managing them.

The United States would gain a very large pool of upgraded diesel submarines but would not necessarily have active missions or crews for all of them. Some boats would have to remain in reserve rather than operate continuously. The post-1945 US mothball system resembled the Royal Navy practice of placing ships in ordinary. Reactivation for Korea demonstrates how preserved hulls and reserve crews can provide surge capacity without paying the full cost of an enlarged peacetime active fleet.