That’s not fair to say. These apps may very well have done one or two things wrong in their code that required Apple to step in. I have a million such mistakes in my code but no one uses them enough to warrant a checkfix.

Also these apps are huge and push the platform forward more than other apps so the likelihood of this relying on undocumented behavior is much much higher and Apple is some sense shares responsibility for those bugs. So the face that they make these checkfixes makes sense.