In a similar vein, in November 2021, a law was passed in France to disallow some domestic flights where the same destination can be reached by train in 2.5 hour

In a similar vein, in November 2021, a law was passed in France to disallow some domestic flights where the same destination can be reached by train in 2.5 hours or less. No idea what it did concretely. There's a big carve out for flights that are taken mostly by people traveling to further destinations.