SwiftUI view builder difference in ios13 and ios15

Question

Just started learning SwiftUI and reading a book, written around mid 2020 using iOS13, which says a conditional view needs to wrapped inside a view builder otherwise it won't compile because SwiftUI won't know what type of the view is. For example, it says the following won't compile but I just tried in Xcode 13, iOS15 and it compiles fine. So has view builder been updated since iOS13?

struct TestView: View {
    @Binding var n: Int
    
    var body: some View {
        if n > 0 {
            Text("Tapped \(n) times.")
        }
    }
}