> Part of the problem is that concrete doesn't age well. The building might start as looking ok, but quickly becomes discolored. It's worsened by the fact that many of the buildings made no accommodation for how they wouldn't allow water to just drip and discolor them even worse.

Funny how people see things differently. For my eye the discolored old concrete buildings look very inspiring and I guess it was the original idea that the buildings show their age...