Although I agree with the sentiment here, I must admit that I have recently started to write small notes in a flat text file. 3-4 lines for each book. Just enou

Although I agree with the sentiment here, I must admit that I have recently started to write small notes in a flat text file. 3-4 lines for each book. Just enough that I can refresh my memory that it was this book that had the interesting ideas about that, for the day when I want to reread it.