It’s one of the oldest cities with modern amenities. When Rome builds its line into the heart of the city, they dig down very deep; where it’s unlikely that an

It’s one of the oldest cities with modern amenities. When Rome builds its line into the heart of the city, they dig down very deep; where it’s unlikely that any ancient artifacts will be found. Meanwhile NYC has 7.4k miles of sewage lines and a lot of unknowns: https://www.bloomberg.com/news/features/2017-08-10/nobody-knows-what-lies-beneath-new-york-city https://www.bloomberg.com/news/features/2017-08-10/nobody-kn... This isn’t meant to be a dick measuring contest, just that it’s a city that wasn’t really planned and so progress is painfully slow. https://opendata.cityofnewyork.us/projects/open-sewer-atlas-nyc/ https://opendata.cityofnewyork.us/projects/open-sewer-atlas-... Yes, there’s a lot of graft, turf battles, and so on but then has its own unique set of infrastructure challenges. Then you have building collapses due to age or shoddy workmanship; not related to boring, but clearly a concern as they extend the line: https://ny.curbed.com/2015/3/26/9976560/explosion-leads-to-building-collapse-on-second-avenue https://ny.curbed.com/2015/3/26/9976560/explosion-leads-to-b... NYC is dense and in Manhattan especially there’s no real business district vs residential. It’s like code that is legacy and heavily used, with very powerful stakeholders. Retrofitting takes a lot of work and red tape.