How is SwiftUI dated? It uses a declarative model. I don’t see UI framework paradigms shifting that much.

It is virtual dom like. We don't have access to a stable underlying element like we could with plain UIKit. You can build declarative models without this virtualdomness. But SwiftUI was created during the react boom so they went with the Zeitgeist, understandably.

Now this is somewhat problematic if someone want to implement better fine grained reactive systems. And I posit that the next paradigm is going to be in that direction given what I've been working on (furthering current reactive systems which only go halfway).