alt Hacker NewsRight, but you could call native APIs from JavaScript or Java say, then in your world that's a "native" application because it uses the APIs the platform provides, regardless of how it actually was implemented? Meanwhile, an application could be implemented with Objective-C and/or Swift but not use Cacoa/AppKit/SwiftUI APIs, then that's not an native application because it doesn't look like one? Like games written with Vulkan/OpenGL aren't "as native" as one using Metal I'd presume?
you could call native APIs from JavaScript or Java say, then in your world that's a "native" application because it uses the APIs the platform provides
Yes, this is what we want.
an application could be implemented with Objective-C and/or Swift but not use Cacoa/AppKit/SwiftUI APIs, then that's not an native application
Correct. The toolkit matters, not the language. Native toolkits have very rich and subtle behavior that cannot be properly emulated. They also have a lot of features (someone mentioned input methods and accessibility) that wrappers or wannabe toolkits often lack. To get somewhat back on topic I notice and appreciate that Xilem mentions accessibility.
games written with Vulkan/OpenGL aren't "as native"...
Games are usually fullscreen and look nothing like desktop apps anyway so it doesn't matter what API they use.