It's hard to imagine NYC becoming significantly more affordable as long as it's so expensive to build things. Whether we're talking about new housing or transportation, the city is a famously expensive place to do construction. There are reports of subway elevators costing $100 million per station. Public bathrooms end up costing millions as well. One driver of costs is insurance, but particularly acute in NYC, with costs as a share of a given construction project having surged over the decades....