There is hope in the rust belt
In 1950, Pittsburgh's population was 676,000. Today, it's about 304,000. Like a lot of Rust Belt cities, many of those people are elderly: 18.3% of Pittsburgh's population are 65 or older, next to only one other U.S. city -- the Florida retirement metroplex of St. Tampa-St. Petersburg -- for such a concentration of senior citizens.
In short, Pittsburgh is a shrunken exemplar of deindustrialization: The world's population is flocking to ever-enlarged cities, but in country after country, this is after fleeing the old urban heartland, per the Financial Times.