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the ibm mainframe has lasted 65 years why it was vertically integrated we're a little less right now in the sense we don't go all the way to dirt in the 60s we went all the way to dirt meaning we found sand we made our own wafers we built our own fabs we built our own chips every single thing out to the metal that surrounded the machine what that avoided was any ip leakage but it allowed us to keep the profit of the complete stack in the company today the only piece we don't do is the actual fab