The SHA-256 ASICs do hashing, they don't encrypt. The energy-intensive part of AI is linear algebra, things like matrix multiplication, convolution, normalization etc. So I don't see much use for SHA-256 ASICs there.
Considering one of the top reasons for SHA-256 is data integrity right there you have a core, fundamental, and critical issue facing AI. Not to mention we don't want the facts or history of the world to be tampered with as we are starting to live in a world where the truth is hard to come by. Hashing addresses it and is a reason why putting AI data and data sets on blockchain is being explored right now.
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