I agree, IKEA instructions are great. A bit related are railroad diagrams, like the one of the JSON syntax [2].

I worked on Rubik's cube solving instructions for beginners [1] (for my children initially), but then I found it would be so much better if the instructions are IKEA style. (Then I vibe-coded a Rubik's cube 2D and 3D model, and now I stopped working on this. Something for later.) For the cube, I want to implement the algorithm, and then from the program create IKEA instruction (or a mix of IKEA and railroad diagram). That way I can be sure I didn't skip any steps in the instructions.

[1] https://github.com/thomasmueller/rubiks/blob/main/README.md

[2] https://www.json.org/json-en.html