Yes, the difficulty of implementing memory back then often isn't appreciated. Core memory was a really important technology for making the modern computer possi

Yes, the difficulty of implementing memory back then often isn't appreciated. Core memory was a really important technology for making the modern computer possible. (Everyone I've talked to who used Williams tubes mentions how unreliable they were.) As for ENIAC, it was upgraded to core memory (built by Burroughs) in 1953.