I've only read two chapters. Seems interesting, although erratic. You can tell the author has a lot of energy. I don't want to read much more, however. Because I've got RSI. I love memory augmentation ideally. But notebooks are a non starter for me. Perhaps I really ought to try memory palaces.
Maybe some kind of dictation / speech-to-text system would work better for you. Think we're at a stage that computers can replace his system, although the idea of tracking thoughts and dividing into subjects is somewhat timeless. Find it difficult to connect with this writer.