I don't think people quite appreciate or recognize the vast work that goes into the base structure of a tower, let alone a mega tall.
The UG work/foundation and first couple of floors generally take an order of magnitude as much time to work through versus a typical floor plate.
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"The destructive effects of automobiles are much less a cause than a symptom of our incompetence at city building" - Jane Jacobs 1961ish
Wake me up when I can see skyscrapers
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