I think the things that surprised me most were that up until Sand Sea, they were all fairly similar in length? And Sand Sea did feel big to me, but not THAT much bigger than the previous. I also had no clue the New Years Specials and Extras were so long, but that kind of makes sense since it's lots of bits and pieces that I read at separate times. And finally, I guess my other surprise was at how long the Post-Restart Sequels are, which I haven't read and was already telling myself "oh boy, buckle up!" about based on what I've heard about the content, but am now also doing so based on length.