Hi folks, excited to share that I just posted an introductory presentation on Crystal’s concurrency 
We talk about CSP, (a simplified version of) Crystal’s execution model, buffered channels and correctness in concurrent applications.
I’ve been working on this presentation for a while, and no matter the rework, I am still not sure I nailed the order and the way in which concepts are introduced. So, If you have any feedback to make this talk “conference-ready”, I’d love to hear from you 