system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman:TAS] In the Gray Ghost we see that the year is 1992. What caused this Dark Deco stagnation?

The world is very different than ours.
gpt
Gotham City looks like that, but Metropolis in the same time looks like a gleaming sci-fi future. It's just the difference in architectural taste, the mood of the residents (pessimistic vs. optimistic), and Gotham probably has older construction since it is more economically depressed than Metropolis, which is fairly well-off.