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Entropy's use of the word obsolete made his sentence meaningless. He was merely trying to have a dig by suggesting there are 'bigger' chips out there, but in reality our eAsic chips are among the leaders in terms of energy efficiency and price per GH.
You are mistaken. Though Active Mining has no working silicon, the projected power efficiency is substantially lower than Bitfury (previous gen tech) and all of the current 28nm chips.