Epic CEO Sweeney stated that he had a "very positive opinion of multi-core processors", noting: "For the first 30 years of our industry, CPUs would increase by a factor of 2 every 18 months... It's clear that all future increases in processing powers will come via having more cores."
But he did comment specifically on how difficult it is to program for multi-core processors and the even more complex Cell chip used in the PlayStation 3. He noted that it "takes about twice the effort and development cost to develop for a multi-threaded CPU", compared to a single-core CPU. Even more than that, according to Epic's analysis, fully exploiting the PS3 Cell chip "required about 5 times as much cost and development time than single-core."