Does building a warship class in very large numbers mean the United States found the perfect design?
Short answerIt means the navy found a design it liked in a form that industry could mass-produce, as Essex developed the Yorktown concept for scale.
NotesLarge production runs show that a navy has found a version of a design that industry can reproduce at scale. The US Navy liked the Yorktown carrier concept. Essex is presented as its adaptation for much larger production. Repeating that design in large numbers therefore reflects both naval preference and manufacturing practicality.