Apple used to brag at the time that the /// was a 16-bit machine because there was a state machine appended to the 6502 to handle 16-bit words and the data buss fetched 16 bits at a time. As it turned out, other than Great Plains accounting software and a few other business packages, what people used it for was running Apple II software, and the fact that Apple added hardware to specifically cripple Apple II mode made that difficult. It was a wakeup to Apple that users would not automatically move from one platform to another just because it was there. They expected the Apple II to III transition to happen the way the Apple I to II had gone, and 20 years out, we'd all be using Apple IXes. It hadn't occurred to anyone that once there was an OS and software base, it became more important than hardware to customers. That lesson resulted on the IIgs.