I carry a Moleskine everywhere. There's a bigger notebook on my desk. I just think better on paper. I took a serious look at those E-Ink tablets, but none of them beat the price or reliability of pen and paper. You can't easily flip through the pages. They're too big. They need an account. They need software updates and long term support. They work with a private cloud.

I'd love a sketch book with layers and an undo button, but at the same time, I appreciate the simplicity and realness of a physical notebook. I can smoothe lines with my thumb, or use colouring pencils.

When I finish a notebook, I scan its pages. It takes about 15 minutes. I suspect I'd spend a lot more time building a system around a digital tablet.