High speed trains and to some extent low cost airlines. But to the most, lack of motivation and ideas as well as excess of stupidity by the managers of Deutsche Bahn (which has essentially usurpated City Night Line) and SNCF (the main operators of night trains a few years ago).

The trains were always well booked. The consequence is that for, let's say a 9 am meeting, the only option you have is to travel the day before, and stay in a hotel. Not even the earliest flights may get you to the meeting in time.