The probability of a major flaw that forces you to throw away the whole chip goes up with die size, so presumably EMIB would allow Intel to manufacture and test

The probability of a major flaw that forces you to throw away the whole chip goes up with die size, so presumably EMIB would allow Intel to manufacture and test smaller chips individually before assembling them into a bigger processor, and that may result in less waste and lower cost. It also might mean large-core chips could be available sooner on new manufacturing processes (which tend to have a high failure rate until they're thoroughly debugged).