[stiGGG]

I don’t think you really can compare Apple’s and Microsoft’s situation here. Think of the extreme bigger amount of software that was written for Windows including all that custom made business software for small companies. Apple was always in the situation that a lot of their 3rd party developers were also „fans“, who are more willing to keep up with their transitions, where however most the Microsoft tech developers were just doing their job and want to keep their stuff only running with the least amount of work necessary.

[microtonal]

Apple was always in the situation that a lot of their 3rd party developers were also „fans“, who are more willing to keep up with their transitions,

That's true, but Apple also got behemoths like Adobe and Microsoft to port over their applications to modern APIs (Cocoa and Cocoa Touch).