How FragmentActivity.onDestroy avoids clearing the store for https://medium.com/@josep.rodriguez/internals-of-android-architecture-components-part-i-the-viewmodel-d893e362a0d9

FragmentActivityOnDestroy.java

public void onDestroy() {
    mCalled = true;
    // Use mStateSaved instead of isStateSaved() since we're past onStop()
    if (mViewModelStore != null && !mHost.mFragmentManager.mStateSaved) {
        mViewModelStore.clear();
    }
}