Interesting.
It's certainly more difficult to light for B&W. But, then again, you'll be as prepared as you would be for colour if you've prepped accordingly. But things can change on set.
The colour should depict the story, if it's B&W for the sake of it, it's a little disheartening. It wasn't a style, it was a limitation. So, I think if you're going to use B&W, then you have to honour the time.
Seeing a group of guys deploying a heist in high-tops, and a 2011 Heat jersey, isn't going to work. Atleast, not for me. I feel it's unnecessary.