What I don't understand, though, is that if the goal is to increase spontaneous interaction and collaboration, the donut shape of the new Apple headquarters see

What I don't understand, though, is that if the goal is to increase spontaneous interaction and collaboration, the donut shape of the new Apple headquarters seems like one of the worst ways to do it. It places people further apart than is necessary, and it introduces a shortcut (walking through what is likely to be an empty courtyard most of the time) that minimizes interaction with co-workers.