One example of rounded rectangles added purely for aesthetic purposes was the desktop window of the old Mac. When the display turned on during boot, it was natu

One example of rounded rectangles added purely for aesthetic purposes was the desktop window of the old Mac. When the display turned on during boot, it was naturally square, but then one of the first things the software did was to round its corners. Then they stayed this way until maybe another software switched into full screen. There was nothing like that on Windows and it was obviously a “useless” thing to do. I liked that detail.