Night trains are wonderful, they save you a night at the hotel, and they basically make the journey take no effective time from your holidays... but SNCF wants to get rid of them entirely, or so I heard.
I thought it was DB who wanted to do away with them. But maybe SNCF too. Due to European railway regulation and thoughtless implementation of the same by the individual countries, international (night) trains have become quite expensive to run. (This in addition to the obvious factors of fast daytime TGVs and irresponsibly cheap airplane flights.)
It will be "completed" in 2020, so we will probably see Trains going in this direction soon.