That’s a good question.
I think that would indeed work best for me.
But I’m not sure that’s always the case for every user. Maybe someone is just cleaning up shop.
I would suggest to start with activating the new window when you move the last tab in a window.
And for cases where there are still more tabs left in the originating window, hold off of automatic switching until there is more feedback from other users in this thread.
What’s the preference of other users on this forum?