I would have never considered doing anything but sending a PDF. Even if they do know LaTeX. Unless they’re offering to help edit the code for me, what good is it? It’s objectively harder to read than the formatted PDF.
That said, marking up a PDF is much more difficult and does require more specialised software and know-how than editing plain text or even editing a Word document. So there are some advantages to it.
I would have never considered doing anything but sending a PDF. Even if they do know LaTeX. Unless they’re offering to help edit the code for me, what good is it? It’s objectively harder to read than the formatted PDF.
That said, marking up a PDF is much more difficult and does require more specialised software and know-how than editing plain text or even editing a Word document. So there are some advantages to it.