A different train of thought. After having used 16.1 with a baseball game, what I started to realize is that the score was so in my face in every screen in every app with such a contrast (black) that I started to become distracted from what I was doing to stare at the score and see if it was going to update. While I think the idea a great design concept to explore, it basically is the opposite of focus modes. I think what might have been a better approach, at least with the sports scores is to collapse the scores into an icon and animate to show when the score updates instead of “3 - 6“ for the entire time the live activity is active.
Another observation was it was annoying that you currently don’t have control over which app has the attached space versus detached. For instance, screen recording the score functionality pushed it into detached with only an icon while screen recording took up the attached with an icon, making both scores go away. Would be nice to be able to touch and pull the detached icon down to make it disappear, similar to dragging an icon out of the dock. Or to drag the detached space to the attached space to swap which one gets more real estate.