Core Data is a persistent storage facility so can be handled either in Swift or SwiftUI.

I wrote a reasonably valued answer on controlling animations in SwiftUI on SO, so I was happy to push the boundaries there: https://stackoverflow.com/questions/58284994/swiftui-how-to-...

The app doesn’t have any super advanced animation, but for most apps, I don’t think that is required. But that’s personal opinion.

This is a longwinded way of saying perhaps you are right and I haven’t fully appreciated more advanced UI, but at the same time many of the basics in SwiftUI cover many use cases :)