Nope, because plain-text is incompatible with centuries of mathematical notation.
This. My wife is a math teacher, and the piss-poor experience of writing mathematical notation outside of MS Word keeps them stuck on Word. As much as she and I love LaTeX's math notation, she can't get her departmentmates onboard with that kind of syntax. They need to maintain notes, guides, tests, quizzes, etc. and basically running a team OneDrive is really the only option because all the alternatives utterly fail…
Mind blown. I only write a little math, and I can't imagine my first choice not being MathJax/LaTex in a plain text file.