I was a math major and I just kept using LaTeX + vim for my whole degree. I got better and better at it and used snippets as well as wrote my own TeX macros to

I was a math major and I just kept using LaTeX + vim for my whole degree. I got better and better at it and used snippets as well as wrote my own TeX macros to save tons of time. I went back and forth between pencil and paper and LaTeX for assignment work. For some courses the proofs were fairly short so it was easy enough to work on paper. For others, the proofs could get several pages long and small mistakes could lead to lots of erasing. It doesn't take very much erasing/rewriting to annoy me enough to switch over to LaTeX. I can't think of a bigger waste of time than erasing and/or rewriting half a page of material because of some mistake.