With so much note taking apps nowadays, I can't understand why does anyone still write notes with pen and paper. You need to bring the notepad, book or that paper to retrieve that information, and most of the time you don't have it in hand. While my phone almost always reachable and you carry when you go out. For those still like to do handwriting, there's many app does that and they can even convert it to text notes.
So, if you still write notes with pen and paper, why?
I can't rely on a piece of electronics that might run out of battery, bug out, etc. Note taking on paper is much faster, you can draw anything with any sort of layout, it's completely free form. Of course it depends on your needs. I know I sketch down a lot because of my line of work, that may not be the case for everyone.
Last time I upgraded my phone, I looked at getting a Samsung Note: I've wanted pen input on a phone for so long. Then I considered the extra weight and bulk, and the poor condition of the second hand one I was looking at, and decided I can just just use pen and paper.
I like to be able to scribble things on paper, though my handwriting is terrible. For anything to last long for me, I want it digital, but random thoughts, calculations and stuff, I like paper and pen.