I don't think there's any bound to 2D visualizations. The challenge seems to be constructing symmetric or useful visualizations, which has kept people busy up t

I don't think there's any bound to 2D visualizations. The challenge seems to be constructing symmetric or useful visualizations, which has kept people busy up to n=11 apparently: https://www.combinatorics.org/files/Surveys/ds5/ds5v3-2005/VennEJC.html https://www.combinatorics.org/files/Surveys/ds5/ds5v3-2005/V...