Skimming through the article, it seems like it was so much easier and faster making a level in DEU back in the day (1994&#x2F;95). It was more or less like the CAD software I was using in my senior year in high school at the time. By contrast, this seems almost counter-intuitive.<p>Then again, the difficulty in getting DEU to run on modern OSes might be an even greater challenge than learning a new, awkward tool.