And even if you type the LaTeX perfectly, when the lecturer draws something around some terms or an arrow or some other doodle, now you'd better be quick with y

And even if you type the LaTeX perfectly, when the lecturer draws something around some terms or an arrow or some other doodle, now you'd better be quick with your TikZ too! Even more so in something like engineering where you have to draw all sorts of diagrams, sometimes all mashed up together.