One of the largest problems with moving to anything other than triangles as the rendering primitive is the decades of industry investment in pipelines for produ

One of the largest problems with moving to anything other than triangles as the rendering primitive is the decades of industry investment in pipelines for producing and hardware (on the player end) designed and optimized to push triangles. There would be huge issue with backwards compatibility for a GPU that defaulted to anything other than triangles, not to mention the graphics API’s designed for those triangle pushers.