Normally, the added noise from setting the ISO too high would be more of a concern, but it can fit well with black and white street photography and lend an artistic feel.
Street photography can involve a lot of dimly-lit street scenes, and they can make for powerful black and white photos. Shooting with a high ISO can help you capture enough light and avoid blur. Normally, the added noise from setting the ISO too high would be more of a concern, but it can fit well with black and white street photography and lend an artistic feel.