What successful naval technology transitions look like

What are good examples of introducing new naval propulsion or weapons successfully, in contrast with Zumwalt and LCS?

Look for quiet transitions such as integrated power, reactor, and frigate programs; successful procurement often attracts little attention precisely because it works.

Zumwalt's integrated power system worked better than the decision to commit to immature weapons during construction. Other examples include the Queen Elizabeth class's propulsion, the American reactor transition from Nimitz to Ford, Japanese engineering changes, and the comparatively quiet Type 31 program. These cases deserve attention because competent defense procurement often generates little publicity. Success is treated as the expected baseline, while failure produces the headlines.