[grishka]

There are two ways of dealing with apps using private APIs though: Microsoft indeed goes out of its way to maintain backwards compatibility, sometimes at the expense of sanity, but Apple breaks stuff — this API is private for a reason, you had to reverse engineer how to call it, and you knew your risks when you decided to use it, so if your app breaks, you get to keep both pieces.

[KerrAvon]

Yes, and I suspect this is informed by Apple historically having APIs that were much more open and prone to what we would know call abuse by developers — but was then just cleverly taking advantage of the environment — during the Apple II/early Mac era.