The upgraded TGV almost halved the time in the Paris-Bordeaux line from 4-4.5 to 2:15. This was a huge difference and combined with the convenience of the train

The upgraded TGV almost halved the time in the Paris-Bordeaux line from 4-4.5 to 2:15. This was a huge difference and combined with the convenience of the train station being close to the center as opposed to the airport, meant that people can easily go on a daily trip to Paris by train. However, the city has been developing heavily before that and Parisians who wanted a nicer place to spend their quarantine have plenty of other places to go to, either in the west part of the country or the south. In my opinion what needs to be done to further decentralize the country away from paris is to improve the connection between the other cities, eg Bordeaux Marseille is 6h by train!