I agree that I will probably never use these notes to go back and actually learn anything. I did this scanning project because I wanted to shred the paper and be rid of it, but I felt I should keep it digitally because it's so cheap and easy to. It seems sad to just discard work, even though the actual knowledge is still contained in the textbooks and, hopefully, my brain. But the doodles are worth more than the lecture notes from a nostalgia perspective.