I could understand the fuss about it though: despite a smaller f-stop, the ground-breaking 75mm Noctilux will have the shallowest DoF thanks to its longer focal length and shorter focus distance than 50mm Noctilux.
What captured my eyes initially was actually the mother and her grandiose faux fur. I was wondering whether I should get closer and take a more animated shot of her. However, as she followed her son (supposedly) from the left to the right, inspecting the statutes one by one, I decided to frame the shot in an abstract way, from a certain distance.
As it's perfect for street photography, 50mm is also perfect for shooting in the snow on the streets. Unlike the highly dramatic telephoto shots, with 50mm you see the realistic rendering of snowflakes both near and far, as you see it with your own eyes. When the snowflakes are perfectly sized, the results could be magnificent.