The bound notebook thing is totally a silly hipster retro fetish. Ringed binders make so much more sense for notes and planning. Insert, remove, and rearrange pages as needed. Bind in irregular bits of paper with those plastic sheet protectors. Add labeled dividers as needed. Add computer printouts!

The only thing to use a bound notebook for is a chronological journal.

I mostly take notes during meetings, which tend to happen in a chronological order.

When I was in school, subject-wise yes I used looseleaf paper. Man it's sad when you lose a sheet...

People said the same thing 6 years ago, but then it wasn't hipsters.