Comparing current LLMs to the ENIAC is thought-provoking; I understand the eagerness to extrapolate in that direction. That being said, I don’t think it will be linear or even logarithmic in progress. The current state of computing and technological advancement has become:
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https://kagi.com/search?q=the+intercept shows a nice wikipedia description:
https://i.imgur.com/OcVM3c3.png