For cutting or artistic affect.
Phil1923 said:Hi David, Good point. I could not believe that it would improve quality.
Cutting just has to have a vector path. In many cases large format prints are enhanced by using vectors and fonts because the viewing distance is close, an example is trade show booths. A person might be standing 3 feet in front of it so the image printed at 125 or 150 dpi looks great but smaller type and graphics don't look to sharp. Print a file which contains properly place vectors and images and all is well.
The real issue is color, if a print exceeds 200 inches PDF is out and EPS in not color managed in most cases that size is viewed at greater distances so a raster file (which can be color managed) works fine. Outdoor work is another dog in the hunt as the stability of the modern pigments is a joke so as long as it looks ok people don't complain.