Some articles say that the @State variable has to be updated in main thread. But I did some tests and found it is ok to update @State variable in background thread. This is my code:

import SwiftUI

@Observable
class ViewModel {
    var name = "old name"
}

struct ContentView: View {
    @State var viewModel = ViewModel()
    @State var title = "old title"

    var body: some View {
        VStack {
            Text(viewModel.name)
            Text(title)
        }
        .onAppear {
            Task.detached {
                viewModel.name = "new name"
                title = "new title"
            }
        }
    }
}

#Preview {
    ContentView()
}

I wonder if it is correct to update @State variable in background thread ? What’s the drawback of doing so？ Thanks.