Another thing here is that everyone is visible in the frame at all times. Here you could even cross the line without causing too much confusion, as the people facing each other would still all be visible in the frame.
But when you film dialogue in a way where you see only one character at a time inside the frame, then the line becomes even more important.
And notice how they lead you from one character to the next by letting the characters turn their eyes to them before they make the cut.
A beautifully shot and cut scene. The tight cutting belies the urgency of the conversation. Something to keep in mind, surely!
We've got a pretty tense scene in Ajax that takes place in the conference room ...one of those "Ah-ha! It's all revealed" scenes that would require something like this...with a little rehearsal, I'm sure we could pull this off.