TLDR; System/360 was the first true family of architectures that spanned 1000x performance speedup, the smallest models were modest and heavily microcoded. The

TLDR; System/360 was the first true family of architectures that spanned 1000x performance speedup, the smallest models were modest and heavily microcoded. The Amdahl System/470 was dependent on IBM-compatible disk drives and IBM lost an anti-trust lawsuit in the late 1960s when they tried to deny cpu support contracts to customers using 3rd party disk drives. Apple today is doing something quite similar by trying to deny repairs by 3rd party companies. IBM broke the law explicitly (tying) through verbal contracts whereas Apple is breaking the law implicitly using needless hardware crypto contracts ... Thats why Steve Cook should lose the anti trust battle. Just watch.