They probably found that the 10th one was systemically defective, and is just disabling it now vs a crap shoot which shipped products will crash or not when usi

They probably found that the 10th one was systemically defective, and is just disabling it now vs a crap shoot which shipped products will crash or not when using theirs. Much like what they'd do with the batteries when they'd go wonky. Or it's simply that much cheaper to yield a 9 core than a 10 from their production. Gotta stretch that profit margin even more, they don't make enough of apple users already.