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> I still think bulldozing 3% of a city’s built environment in 5 years time seems extremely unlikely, but YMMV.

Having the average age of replacement of a building be at 150 years old would result in approximately 3% of the city being replaced every 5 years. That seems a bit long to me, but within reasonable expectations. I would expect to see more than 3% of the city replaced every 5 years.



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