I agree that at the draft stage it's not desirable to use LaTeX, or when you need to collaborate with non academic users. But Libre Office is really not a serio

I agree that at the draft stage it's not desirable to use LaTeX, or when you need to collaborate with non academic users. But Libre Office is really not a serious alternative to LaTeX (please don't ask why). Use markdown in the beginning, and when you have enough materials, you can export to LaTeX and do the final editing.