How many pieces of technology developed 45 years ago are now more popular than ever?
I thought about this while running some UNIX shell commands in Linux (based on UNIX), which I am running as a alternate operating system on my Chromebook to ChromeOS (based on UNIX). So I picked up my iPhone running iOS (based on UNIX) to write this post, which I will put on Facebook, which runs on UNIX-based servers. Some of my friends will read my post on their Android phones, which run an operating system based on UNIX. Others will read it on their Macintosh computers, which run an operating system... based on UNIX.
And the really amazing thing here is that the work of Thompson and Ritchie endured several decades of ridicule before becoming the most ubiquitous piece of software in the world. And the reason for its success is intimately connected to their humility: instead of believing that they knew everything a user would want and building it into a monolithic operating system, they built a minimal framework within which it was very easy to add your own tools. They crowd-sourced the development of their operating system well before anyone had invented that term.