Some images work better in black and white. Not just because the lighting situation was that bad that there wasn’t much color anyway but because of the feel it can give to an image.
Sometimes black and white gives an instant nostalgia to the image. You can fish for some of my black and whites by clicking here to see what I mean.
In some cases I see it like putting slow motion to an image as it takes away every ballast and distraction.
For a better demonstration I embed a brilliantly made music video below that is taken in black and white with super slow motion. I think this makes the point clear if I haven’t already.