eh I'm ignoring classic theory as well as SF conformity but I think black 'dress' shirts have their place. I wouldn't encourage anyone to go out and buy them per se, but as someone who owns a couple from pre SF days and am required to wear black/white for service industry work, I do find ways to use them. If you're young and going out to a bar or club, it looks fine with jeans. If you want a nightclub/bar dressy look, I think a charcoal suit with black shirt looks good, and I've seen once a black shirt with navy suit look good but I think that one's harder to pull off. It's tough to do well with something like beige or a lighter grey, but I think it's doable. Some examples below...
beige

charcoal

light grey

