I always feel safer in something over engineered. The Midways lasted longer than others of the era, were more adaptable, could withstand more increases in displacement. The British Audacious class were the same. And after all the DC3/C47 is still around after being in production in the 30's

Better than all the smart people and their 10% safety margins, 1 to 3mm of aluminium protecting you from solar radiation in todays planes at 30,000 ft. Fly too often and your sterile ha ha
No doubt todays Steels with their manganese, carbon and many other constituants allow larger ships under less weights but I don't think a Nimitz size carrier would have been impossible to build in the 40s if the drive was there