They're not. Asics are more a function of the coin being mined. Namely, if asics are out and competitive, they generally replace gpus altogether as they're both

They're not. Asics are more a function of the coin being mined. Namely, if asics are out and competitive, they generally replace gpus altogether as they're both more powerful and efficient. See btc, where gpu mining is completely worthless. Eth on the other hand has no notable asic out AFAIK, and requires gpu mining. Eth miners, regardless of scale, thus require gpus.