[Skeime]

Last time I checked, Word was also basically untenable for math-heavy writing because there was too much procedure involved in setting a formula. This is fine if you need one here and there, but if you have lots of formulas (including many tiny ones, like just using the name of a variable), switching to a dedicated formula mode in the interface is just not pleasant. In LaTeX (or Typst), I just type $, and off I go.

[Jap2-0]

Alt + = will put you in the equation editor fairly easily, and from there you can pretty much use LaTeX notation.

[Skeime]

Even with a keyboard shortcut, I never found it to be truly satisfying. I cannot quite recall what was annoying, though. Maybe you cannot space back into the formula after closing it? (I certainly recall having the experience of typing a formula, closing it, noticing a mistake, hitting backspace, and deleting the entire formula.) Maybe there was just a slight delay for the formula editor to open? Also, $ is still more pleasant to type than Alt+=.

I would be willing to try again, but I'm not buying Word for the privilege.