They're a good form of 2D history; also I think we should build the master tree! 🌳
Tim Hwang is organizing a symposium on tech trees! You should come.
I would imagine that James Rosen-Birch would be delighted to have served as the inspiration for your thinking and writing. Inspiring careful thought and response is way more important to most thinkers than just inspiring “agreement.” After all, disagreement opens up way more opportunities for further development and refinement of any idea than does mere shallow agreement. I enjoyed your article very much.
I've been thinking a lot about Tech Trees (and Tech Nets) lately with respect to the order in which to build fundamental AI technologies, so this is quite a timely post. Wonderfully comprehensive!