What is remarkable is that he had a ~12 year career in professional SW development and hasn't really done much in the field apart from Xscreensaver updates since and is still remembered 20+ years later.

One of my favorite quotes from JWZ: "“In 1999 I took my leave of that whole sick, navel-gazing mess we called the software industry. Now I'm in a more honest line of work: now I sell beer.”