[readarticle]

For now. It’s still a first class citizen receiving the full attention & buy in of the platform to a level even Swift itself didn’t receive this early on AFAICT (iOS 14 widgets can only be written with SwiftUI).

[LeoNatan25]

That's an arbitrary limitation. Some of Apple's widgets are not written using SwiftUI.

Just like Swift, I foresee SwiftUI being a black sheep for a very long time.