What would a no-treaty-limit World War II destroyer using the best British and American technology look like?
Short answerIt would look much like the Daring class, the large and versatile destroyer the Royal Navy had effectively been working toward since 1938.
NotesThe Royal Navy already built the requested no-treaty-limit dream destroyer in the postwar Daring class. Its design follows directly from the 1938 L70 concept, showing that the requirement existed before the war even though the finished ships arrived later. The Daring combined enough size, firepower, and versatility to function almost like a light cruiser and was judged capable of fighting an enemy heavy cruiser one-on-one. Deployed in flotillas, ships of that quality would make a particularly formidable surface force.