That is so sad, he was in his late 60s and it seemed like he had a lot of life left in him, talking about how software can get better and having a great (and sometimes snarky) outlook on the profession.

Highly recommend his thesis (2003) and a few of his great interviews/presentations for anyone who isn’t familiar with Joe, it captures a lot of what he thought about and pushed for in his professional life.

http://erlang.org/download/armstrong_thesis_2003.pdf https://youtu.be/fhOHn9TClXY https://youtu.be/lKXe3HUG2l4 https://youtu.be/rmueBVrLKcY

I hope his family and friends can find some comfort in how much he was appreciated and admired in the development community.