Vector is amazing for things that potentially need to be resized. I do a lot of scale drawings for work, and I never know if it’s going to be printed on something as small as letter size paper, or blown all the way up to something like a plotter blueprint size print. And working in vector means the gigantic plotter print isn’t blurry, because the drawing isn’t comprised of individual pixels that blur when you zoom them in or out.

It also means I can get extremely fine detail on something that may normally only be tiny on a page. For instance, maybe I have a 50’x50’ room, and I have a small 4 inch object to place in it. On the regular letter paper size, that will basically just be a dot. But I can zoom waaaay in for a detailed image of that object if needed.