It's also important to realize that although MP machines are rare now, multithreading processors (like the latest Pentium 4) are becoming more and more prevalent. Thread switching is seen as the easiest way to keep the processor fed, and taking advantage of it will be more and more important as time goes on. It seems like every processor company has a multithreading or mp processor coming out in the future, and I'd hate to see python lose out on that wave. And since it seems like half of tech success is marketing, just losing the marketing point could be a loss. I'd love to see Python succeed everywhere in the future, but I'm a little worried.