I don't think the inversion of control that SwiftUI or Jetpack Compose do on MVC is particularly fundamental. Factoring out the diffing of state when an observe

I don't think the inversion of control that SwiftUI or Jetpack Compose do on MVC is particularly fundamental. Factoring out the diffing of state when an observer is notified of updates into a single place can be a useful thing to do in certain cases, such as when a bunch of teams are all putting things on the screen and you don't want one of them to screw up the update loop for everyone (thus Facebook's use of React), but it makes the creation of composable views less straightforward, and you end up with the new problem of annotations to try to keep recalculation of the whole UI from being a performance problem. In MVC, a compound view can usually short circuit updates of its child views very naturally when there are no changes needed. I just opened a couple of Swing programs on macOS. Other than not having dark mode, I couldn't see any major difference. I can't check it on Windows right now. So, no, I don't live under a rock.