Unlike what most LaTeX users may think, LaTeX is actually not even widely adopted in academia, with less than 20% of scholarly articles published every year written using LaTeX (https://www.authorea.com/107393-how-many-scholarly-articles-...). That said, it is the only powerful option to professional typeset mathematical notation. And for that reason, it is used by few in some non-academic research fields (military, gov, pharma, tech, HN readers).