I'm so glad that you liked the book. It was such an interesting concept and definitely thought provoking. I still think about it almost a year after reading it. Its like thinking about the size of the universes lol.
It would have been nice if the book was a little longer but I also worry that it would lose its impact if it went too far. It might become boring with too much filler material or too dense with philosophy or something like that. I found it to be very impactful and philosophical but also very accessible for any type of reader. I kind of like that it said what it needed to say and then ended, rather than feeling the need to hit a word count to be more mainstream. Just my thoughts.