[uhura]

Old WWDC content has a lot of value. They cover a lot of core technologies that Apple has no interest in covering and documenting again (because they deprecated and are removing old documentation instead of improving them...). The channel in question helped me a lot while trying to understand aspects of early-Cocoa.

The argument you've presented is more related to the way Apple handles the evolution of its software than about having old content laying around. Their current approach is far from good unfortunately. During OS X Lion days, Xcode documentation was so rich that even core concepts of the OS were covered.

Having a structured way to keep those informations readily available is very important to help us preserve software history. And Apple is not helping...