Cities need old buildings so badly it is probably impossible for vigorous streets and districts to grow without them.... for really new ideas of any kind--no matter how ultimately profitable or otherwise successful some of them might prove to be--there is no leeway for such chancy trial, error and experimentation in the high-overhead economy of new construction. Old ideas can sometimes use new buildings. New ideas must use old buildings.
Jane Jacobs[ Renรฉ Lรฉvesque] didn't understand why things do collapse. It's usually a very banal reason why things do collapse. It's not a grand reason, why they collapse economically, at least in the West.
Jane Jacobs