In this (Corporate Portraiture Advice) question the photographer explains that he/she is going to use a white background when photographing coorporate portraits even when the final presentation would have the subjects against black, the idea was to cut them out from the background in post.
In some of the answers and comments people objected rather strongly to this use of white background when final presentation would be on black, arguing rather for a black background.
Why is that? Why should a black background be preffered?
My initial thinking when reading the question was that if enough light spilled on the background it would be compleatly blown out thus making the cutting out trivial.