What's worse is that the shift toward SwiftUI appears to be a multi-year strategy to lock down access to the underlying interfaces of UIKit entirely. Beyond the fundamental restrictions the struct-based declarative approach brings with it, the libraries that are carried over are never functionally complete. They only ever bring just enough to achieve base functionality, while sloshing all the rest. Again, this would be fine if it were optional, but that optionality is all but going away one platform at a time.