For riding in city traffic, I like to know that my front brake is capable of locking the front wheel....not that I'd ever want it to, but the knowledge that it has the power to make a very quick (modulated, controlled) stop when someone cuts me off is comforting. Also, counter to many peoples' experiences with drum brakes, I've found SA's 90mm front drum quite capable of inspiring this kind of confidence, plus it's very smooth and quiet (most of the time, anyway...I've actually had the occasional experience where it feels a little grabby)