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The original plan was to run it to the "city centre" at People's Square and then on to the other airport in town Hongqiao. The problem was expense, and for money to be a problem for the infrastructure-happy Chinese, you know its not economically viable for the majority of countries on earth.

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The problem is not simply expense but whether the expense is worthwhile. Given Shanghai is already connected by a subway web, the benefit of directly connecting two airports with maglev is very questionable.

Maglev is just a bit extreme but more traditional subway systems are already super common across the world. The RER trains in Paris is exactly what I mean by an express subway system. It’s much faster than the other metro system in Paris simply because it has fewer stops.

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