This. Their documentation on CoreAnimation concepts was wonderful [1]. It even has these little appendix sections discussing advanced use-cases. Sadly, they se

This. Their documentation on CoreAnimation concepts was wonderful [1]. It even has these little appendix sections discussing advanced use-cases. Sadly, they seem to have stopped writing these at around 2015... [1] https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CoreAnimation_guide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40004514 https://developer.apple.com/library/archive/documentation/Co...