That brings up another thought I've had over the years. From an end user perspective, which is more valuable -- a Free Software program that is very difficult

That brings up another thought I've had over the years. From an end user perspective, which is more valuable -- a Free Software program that is very difficult to understand and modify, or a non-Free program that has a well documented extension API? For example, if the world of web browsers consisted of a non-free browser that was ported to run on almost any platform that had a well documented extension/plugin system, vs. a Free web browser that was a mess of spaghetti code that no one would really want to touch, and didn't support any extensions -- which browser would be more valuable (both in general, and in specific ways)?