He is an exceptional engineer. In 1986 I developed an instant messaging system that worked across the internet on X Windows. It was very popular at HP where I worked. It ran on X Windows and had many of the features of modern messaging systems like WhatsApp. I didn’t think twice about it. A few years later I saw how these apps took the world by storm once the internet became popular. I think I had caught lightning in a bottle but didn’t appreciate it. It’s kind of the opposite of Sasson. However in both cases we were lousy evangelists. Also I’m not an exceptional engineer.