As a non-mathematician this shone some light on a story that I am aware of being interesting and controversial but have no understanding of. It let me see how the debate is developing, and I think it left me with a fair and clear idea of where the story has got to - with enough explanation that I can see why the debate rests where it does. It also helped me see a little of what the argument is about and what the protagonists are arguing over.
What spectacularly clean, concise and elegant writing, a level of quality I so rarely get to appreciate. For that alone I'm printing it out to read again later and learn from.
And the maths side is a bonus.
Thanks, author!
This is an excellent update on the current status of the proof, with a very good overview of the benefits of using category theory.