SwiftUI is still broken for any non-simple apps, almost a decade after its introduction. Completely unacceptable for big apps. Look at OmniFocus, who inexplicably became early-adopters of it, and it's had a bunch of UI glitches and inconsistent behavior requiring app restart (like you select one list item, but the inspector shows you details for another list item) ever since.

Apple only has itself to blame for Electron's popularity.