I want to know the answer to the following question:
What feature was missing from the final Mac design produced by Smith?
All the background I'm provided with is that "Bud Tribble, a member of the Mac team, was interested in running the Apple Lisa's graphical programs on the Macintosh, and asked Smith whether he could incorporate the Lisa's Motorola 68000 microprocessor into the Mac while still keeping the production cost down.". Is that enough to answer the question?