I'm a professor and research mathematician, and I use LaTeX for nearly everything I write. In addition to what others wrote -- - The way I conceptualize it, La

I'm a professor and research mathematician, and I use LaTeX for nearly everything I write. In addition to what others wrote -- - The way I conceptualize it, LaTeX is a word processor. So, for example, if I'm writing a rec letter and I choose LaTeX over Word, I'm thinking "I like this word processor better than that one." - LaTeX/PDF is often criticized for being static, but in my experience, this is a good thing in most cases. If I am discussing the contents of a file with someone else, it is useful if we are both looking at exactly the same thing. - I don't try to do any significant programming, or extensive customization of how my documents look. I agree that trying to do so would be annoying, but this is not part of my use case. If you look at a random selection of math papers, say here https://arxiv.org/list/math/new https://arxiv.org/list/math/new you'll notice that all of them look more or less identical.