@pimoore Only if you're not being creative. I find I can carry just about anything I need in a pretty compact form factor. What about when your notebook is full of material you don't need except for those two pages which on index cards you can fold up and toss in your pocket? Or maybe those times when you've got material across three notebooks which then all need to be carried instead of a smaller subset? Maybe a book ring and a holepunch or a simple binder clip will allow you the best of both worlds. Each of these modalities has a variety of different affordances which we don't often think about.