I used, for years, an older 135 mm Schneider Companon (Chrome barrel). I enlarged 16X20's with it and noticed no appreciable light fall off. I now use a 150 mm El Nikkor and the increased sharpness and contrast is apparent, not that the Schneider was a "bad" lens, just that the more modern lens is better.
Depending on the subject matter, I might be inclined to use the older lens at times. Portraiture, if I did it, would probably be an application that I would try the older lens.