I think it is mainly the extra time spent on the foundational definitions - ie. multiple paragraphs and multiple interactive widgets just to clarify what is mea

I think it is mainly the extra time spent on the foundational definitions - ie. multiple paragraphs and multiple interactive widgets just to clarify what is meant by a bi-vector. I don’t claim to have delved very deep in the topic before, but of course it is standard to start with definitions - and I found these definitions particularly clear & disambiguated.