>>1244827While it is true that local lines have been neglected for too long, the situation in France is not as bad as you picture it. Rail usage is almost the same as in Germany, in spite of a smaller population.
It is now widely recognised that the French HSR network has reached an almost finale state, and that further investment should be directed to regional lines. With the end of the SNCF monopoly, we might have the best of two worlds in one decade.