As I see it, the benefit in retaining historic areas is that they are typically so much better at creating a certain kind of "place" that people are interested in. However, usually urban designers realize that in intimate public settings like Exchange Street, frequent entrances do just as much as high degrees of fenestration to create a seamless transition between public, semi-public,, and private urban spaces, thus creating a more enjoyable whole. I, therefore, would be open to seeing a door replace some of those windows, if it fit contextually. That being said, there are good arguments on either side of the debate.
