But they can silently drop their mistakes without ever mentioning them again, for example Garbage Collection, Modern Objective-C Syntax, Cocoa-Java.

While they will do this and just start treating the old thing as if it were brand new and shiny, it helps if they actually do have some new shiny thing.

Happy to rebrand Objective-Smalltalk into AppleTalk. The network protocol was dropped 15 years ago, so that could work.