To put stuff in perspective - whatever smartphone you have in your pocket now, it is a few orders of magnitude more powerful than those gigantic beasts. At the time. the idea that we would eventually develop gigahertz chips the size of a dime in less than a century would be discarded with all the "THE END IS NEAR" and lizardpeople in the sewer theories. – T. Sar Jan 25 '19 at 16:20