In university, I didn't use pen and paper: I took textual notes in Mathematica or Rstudio (depending on the class) and drew graphs on the screen, using the Waco

In university, I didn't use pen and paper: I took textual notes in Mathematica or Rstudio (depending on the class) and drew graphs on the screen, using the Wacom mode of my thinkpad. Sometimes I just used xournal. I type faster than I write, and I had direct shortcuts for all the greek letters for the formulas (α β γ etc) Separately, I had a Sony MP3 record and a digital camera to take high res pictures of the graphs drawn (I could have used Onenote to synchronize but it seemed overkill) That was extremely helpful: during the class, I could do some plots or run some experiments to clarify a concept and ask questions if something didn't make sense to me. And right after the class, I would gather the different parts to make my own notes and interpretations of the material presented. It was around 2017, and half the people were using similar setups. I mostly saw laptops, maybe because iPads with pens didn't exist yet. If they had, I would have certainly tried one!