if they intend to sell to foreign markets, they sure do. RISC custom chips may be useful for homegrown tech, or embedded systems, but the consumer market cant possibly be like that - every one expects their software to work everywhere!
What's their market share for desktops in office, entertainment, and business sectors? Probably almost nothing in favor of mostly Windows and Mac OS X desktops running Intel or AMD processors. Legacy compatibility, both OS and popular software, is extremely important for marketing a CPU. Notice how iOS and Chrome OS specifically targeted a sector where that didn't matter.
Of course, now the effect applies to those two where people wanting iOS were stuck with ObjectiveC and ARM while people targeting ChromeOS had to support its ecosystem/model. Legacy effect just shifts here. Truly portable and self-contained software is rare these days. Mostly only OSS stuff.
