Hey Ivan, thanks for sharing the great article! I actually read it last year and left a comment (name is Chentai). Back in 2019 I built an IntelliJ plugin [1] as a prototype for Java, and now I'm building Codemap as a natural follow-up. Glad to reconnect :) I definitely share your sentiment towards visual programming. AR/VR may be a better vehicle to convey the code structure, but I think 2D call graph, if done well, could serve as a valuable stepping stone for now. Hopefully Codemap can be the tool that inspires future design and thoughts.

[1] https://plugins.jetbrains.com/plugin/12304-call-graph