Using pure DOTS, I was able to a little over 100,000 rotating cubes on screen running at 55-50 frames per second. The video shows 40fps because of the screen recording software, ShareX. I was also in Editor, so that dishes out a performance hit. After recording this, I was about to get triple the amount of cubes at just over 300,000 cubes running at 50-60 fps. Here is the GitHub Repo