Thanks Aleksandur Milushev for sharing your inputs.

After ponder and explore further, my understanding of ViewModel should be SavedInstanteState replacement is not right. Check out my further inputs below.

Architecture ViewModel vs SaveInstanceState

Nonetheless, the inability for ViewModel to automatically handle SaveStateInstance and still need activity/fragment to help is really making the ViewModel solution incomplete. With that they now introduced SavedStateHandle. Check out my experiment on it in

Architecture SavedStateHandle — the ViewModel’s compliment