I don't know which URLs are broken, but I don't have a hard time finding docs from Apple. I rarely view docs based on a URL another dev passes along. We usually trade advice like "check out the UIViewController doc" or "read the Threading Programming Guide" instead. In an ideal world the URLs would be consistent and concrete, but they're really secondary in this particular culture. I think you're making a mountain out of a mole hill to be paranoid about it.

It's a culture thing. Steve created a much more ambivalent relationship to external developers than the usual love affair most tech companies strive for.

Microsoft has always been about the ecosystem, for Apple third-parties are always a threat to a smooth user experience. When the video driver on your mom's PC crashes, does she blame Nvidia who wrote the code or Windows?

You make an excellent point. Given the low quality of the driver ecosystem, I'm amazed that most Windows machines function at all. ATI, Creative, and Silicon Image are at fault for 90% of the BSODs I've ever experienced.

messy kitchen, exemplary dish