K3's guns, secondary battery, torpedoes, speed, range, armour, and firepower form a package capable of making older fleets appear obsolete. The counterfactual has the US Navy telling Congress that much of its existing battlefleet no longer has first-line value. Those ships could still perform secondary duties, so physical obsolescence would not make them useless overnight. The harder problem is that retaining them would consume crews and money while a new primary fleet also had to be built and manned. Technological superiority therefore becomes a force-structure problem involving personnel and defence budgets.
Notable Point · 25:47-26:34
A single K3 could make an old fleet too costly to retain
K3's effect is framed as a force-structure and personnel problem: older ships might retain second-line uses but still consume crews and money needed for a replacement battlefleet.