Well excuse me for needing to design multiple 500+ acre drainage systems a month, plus spec example materials, while interfacing with clients and completing a half-dozen other engineering reports. When AutoCAD crashes and you lose 3 hours of work (after suffering through the buggy mess of using it) I WILL let the whole office know it by vocalizing a loud and angry "FUCK!!" The Roman engineers likely only had one project at a time and could concentrate on it AND they had the help of a dedicated team.