An absolute tour-de-force article, which I've skimmed and plan to go back an re-read.

One point though, successive versions of XCode help have got slower and slooowwwwer. The current 'public' release is wretched compared to even a couple years ago.

This is reminiscent of what happened to Visual Studio / Visual C++, in that Visual C++ 4.2 (?) had a fantastic super-speedy help, which basically slowed down to a crawl in later versions, and lost its 'tight' feel.

Even if nothing else in XCode got fixed, speeding up the documentation would be a big step forward.