Using Swift 5.7 we're trying to use protocols for testing and mocking in our SwiftUI App. With any and some we're able to hold a heterogeneous list of protocols with self constraints which works perfectly. What we're running into now is that we can't undox the any Protocol into a concrete type for the view. Here's a basic example: protocol ItemProtocol: ObservableObject {     var id: String { get } } struct ListSection {     var id: Int     let title: String     let items: [any ItemProtocol] } protocol ViewModelProtocol: ObservableObject {     var sections: [ListSection] { get } } struct MyView<T: ViewModelProtocol>: View {   @ObservedObject     var viewModel: T     init(viewModel: T) {         self.viewModel = viewModel     }     var body: some View {         List(viewModel.sections, id: \.id) { section in             Section {                 ForEach(section.items, id: \.id) { item in                     RowView(item: item)                     // create view for some ItemProtocol                     Text("Hello Item")                 }             } header: {                 Text(section.title)             }         }     } } struct RowView<T: ItemProtocol>: View {     @ObservedObject     var item: T     init(item: T) {         self.item = item     }     var body: some View {         Text("Row View")     } } This will result in an error: Type 'any ItemProtocol' cannot conform to 'ItemProtocol' I had hoped that the any ItemProtocol would be unboxed to it's concrete type and a concrete type of View would be created.