The author’s takeaway here is “If your target platform is iOS 14, you’re now good to go with hobby projects or individual screens in SwiftUI.”

I think that’s generally pretty reasonable but in my experience you won’t even be able to reach the end of your hobby app without hitting some wall where a feature you want is simple in UIKit and not supported at all yet in SwiftUI. SwiftUI is great, the paradigm is refreshing but unfortunately it just isn’t ready yet.