Oxfords are an important and unavoidable addition to your formal look. Your suited style is pointless and incomplete without the oxfords. They are smart, elegant and sexy. It is the one style of shoe that you absolutely need. It is the perfect formal pair and is yet highly avoided because it is narrow in the front. Men with wider feet dislike oxfords. You can always get a pair made to fit your feet size.
However most men try to replace the beauty with brogues or derby but it is important to own at least one pair for the perfect dressed up black tie event. You cannot call your look formal without these and they are conservatively game changing.
This is one of the vintage styles that actually stuck around through all these years and hence deserve the respect and importance. Also you can avoid wearing them to work on a daily basis but surely own a pair for important occasions like black tie events as well as important meetings and conferences.