Voronoi is an efficient isolation algorithm (can be applied to circuit routing), one that requires less work to do to make circuit connections on a copper clad board. Disadvantages - software for voronoi patterns may not exist - does it?
Another good picture: 
Open Source Voronoi Toolpath Work
- Sliptonic, aka Anders Wallin is doing it in FreeCAD - https://github.com/aewallin/openvoronoi - and http://www.anderswallin.net/category/cnc/cam/openvoronoi/