My advisor was a physicist, and a Fellow of too many societies (IEEE, IoP, APS, etc). He did not know LaTeX. Most of his papers probably were in LaTeX, as his

My advisor was a physicist, and a Fellow of too many societies (IEEE, IoP, APS, etc). He did not know LaTeX. Most of his papers probably were in LaTeX, as his students knew it. But I remember multiple papers he "authored" in Word, because that's what the student preferred. I was in a top 10 school (in physics and engineering), and I can assert that the fraction of physics faculty who did not know TeX/LaTeX was at least a quarter, and could be as high as 50%. All the major physics journals would accept Word submissions. It's not at all unusual.