I'm more inclined to say that Part 3 is the most important (transaction semantics) for other protocols development and that's what's on my mind right now. Part 5 would be the foundation of consensus. Thinking out loud, maybe I'm taking consensus for granted during the previous parts. In the overview of Part 1, I plan to explain all the mechanics, including distributed consensus, but without going into the details. Indeed, I feel it didn't work well last year. Maybe I should consider a lecture dedicated to consensus. Thanks.

It's nice to see an actual Bitcoin focused lecture! I used to be invited to give a Bitcoin compsci lecture at a local technical university and tried to cram everything into a single 2 hour lecture. I don't think people learned much from that back then 😅. I think I would have structured it the same way 4 yesrs ago, but I am more inclined now to say that consensus is the actually important part to grasp.