One of my hobby projects while in University was to do OCR on book scans. Doing character recognition was solved, but finding the relationship between characters was very difficult. I tried "primitive" neural nets, but edge cases would often break what I built. Super cool to me to see such an order of magnitude in improvement here.

Does it do hand written notes and annotations? What about meta information like highlighting? I am also curious if LLMs will get better because more access to information if it can be effectively extracted from PDFs.