I don't see any reason to believe this isn't happening already. As old school as Buffett is (and the man is a legend in my eyes), it just doesn't seem a stretch

I don't see any reason to believe this isn't happening already. As old school as Buffett is (and the man is a legend in my eyes), it just doesn't seem a stretch to think that they're running at least some deep-learning-based analysis over the deals they consider. Whether or not they give any weight to the output is quite something else, but it would be such a (relatively) trivial cost to get that answer that it seems less likely they'd not do it.