My default assumption right now is that this sort of grand construction is generally infeasible in countries outside of China where they generally don't care who they displace or the environmental damage, and often are building the cities from the ground up in the first place with the trains as a part of the urban planning.
I've been peripheral to a few urban light/heavy rail expansion projects in the US and the consistent issue is that even cities with a lot of urban sprawl are still dense enough that you have to displace a lot of people/businesses to build a new line and the stations around it. It's the sort of thing that's a lot easier to do when the city is young, or the train line got built in an era where you could just force people to sell their houses and move.
I'd be honestly curious if anywhere in the EU has managed to put in a totally net-new line like this outside of existing tracks that included a stop at the city center and various stops on the way into town. Almost every city-center train station I've ever been to in Europe was over 100 years old (even if the building had been upgraded) and seemingly using most of the same lines.