Ask HN: Do you prefer paper or computer for note taking?

I'm asking mainly in the context of learning new stuff. I'm studying machine learning/data science-y type stuff right now, and although Jupyter notebooks are amazing for this, I also can't beat the convenience of sketching out a graph, diagram or equation in a notebook.

I usually prefer to centralise my notes rather than have them in two places, so it's something I've been thinking about recently.

How do you organise your note taking life?