I'm primarily a Mac developer. From my outside perspective, the Windows framework churn looks enormous. The "best way" to write a Windows app went from Win32/MFC, to WinForms, to Silverlight and WPF, to WinRT, and still seems to be evolving. The preferred language has gone from C++ to C# to C++/C#/JavaScript(?), and now MS is pushing a UI framework that seems terribly ill-suited to what traditional desktop apps have done.
On the Mac side, the story has been constant since OS X first shipped: the best way to write a Mac app is to use the Cocoa frameworks, with Objective-C. There was some churn around garbage collection, and now Swift, but overall the developer story has been much more stable than with Windows.
On the Mac side, the story has been constant since OS X first shipped: the best way to write a Mac app is to use the Cocoa frameworks, with Objective-C. There was some churn around garbage collection, and now Swift, but overall the developer story has been much more stable than with Windows.