My philosophy is the same.
Except I like to save as much space as possible hahaha. I omit the small details but I think general concepts are important to write in detail so I end up taking several pages of minuscule text in each class hahah. My memory kinda handles the rest. But without writing down notes it's harder for me to retain details.
My ILE buddy also used tons of paper for his math stuff. Since he was using so many notebooks he just started taking notes on his computer and a drawing tablet. Great solution imo for anybody with big letters.