You'd find that STEM professionals (and academics, as some would say those two sets are disjoints) simply write LaTeX in their mails; I even find myself saying

You'd find that STEM professionals (and academics, as some would say those two sets are disjoints) simply write LaTeX in their mails; I even find myself saying it when conversing face to face (but you loose the slashes: "take varepsilon less than frac x over y"). That's one big strength of LaTeX: everybody (in certain professions) knows it, so it is easy to collaborate on LaTeX typeset documents.