An advantage with the traditional box characters is that you get consistent 0.5 character margins and paddings. In the example, there's obligatory 1 character

An advantage with the traditional box characters is that you get consistent 0.5 character margins and paddings. In the example, there's obligatory 1 character vertical margin and horizontal padding (or vice versa). If you want consistence, you have to add one character of vertical padding and horizontal margin, or if you allow "rounded" (missing) corners, I suppose you could have margin in all directions and no padding.