Just look how embarrassed I am when I try to help a user who is facing 0xdead10cc on watchOS: https://github.com/groue/GRDB.swift/issues/998, without any clear reference to show. Come on, seriously, when documentation is erased and links are broken, it has consequences on people. Even eskimo's post about background tasks has moved (just see the next post)! What a sick joke.

Eskimo's post about background tasks in now available at https://developer.apple.com/forums/thread/85066

This link is dead. I'm quite shocked. Where can we find the text of TN2151 now? Where can we send users for reference? Please someone put this tech note somewhere online. Please someone in charge makes sure such important information is not erased from internet. Please someone stops considering documentation as radioactive waste. :-(