Diagrammatic notations seem to pop up all over the place, but in my mind they all share a difficulty that interesting complex graphs tend to not be planar (can'

Diagrammatic notations seem to pop up all over the place, but in my mind they all share a difficulty that interesting complex graphs tend to not be planar (can't be drawn without criss-crossing lines). That makes it hard to organize in a skimmable/glanceable way. I'd love to see what a future with ubiquitous 3D volumetric displays or VR or whatever could do for diagrammatic notations. You might suddenly be able to organize larger diagrams and I wouldn't be surprised if diagrammatic notations became more useful and started popping up more in that hypothetical future.