My favorite Erlang movie: https://www.youtube.com/watch?v=BXmOlCy0oBM (“Erlang: The Movie”)
Joe Armstrong is really a treasure trove of fun, interesting and accessible ideas. Of all the projects I remember that I really looked forward to being realized, sadly never really was. That was UBF it was the first time I was remember seeing a contract that so succulently described an event system. Having lived in the event sourcing world I sometimes wonder how much a contract like this would help be grok new parts of a system.