While not the person to whom the question was directed, I'd offer that the move from QuickTime to AVFoundation (taken directly from iOS) & friends (CoreMedia, CMIO) was one such example. Core Media I/O was released a few years ago to replace vdig and/or sequence grabber IIRC. Despite being released a few years back, the only documentation available for CMIO is a sample project. AVFoundation was limited in terms of codec support relative to QuickTime offering only support for built-in codes. Just as an example. Of course QuickTime had no 64-bit future so Apple had to do something but it was and still is a bit of a mess years down the road.