The only case I have seen like this is the Eurostar, but that is because of customs checks, border controls, etc, which don’t exist within the Schengen area. Th

The only case I have seen like this is the Eurostar, but that is because of customs checks, border controls, etc, which don’t exist within the Schengen area. This is a very specific case and is not representative of how most people travel by train in Europe. You don’t have to come particularly early for the Thalys in Paris, for example.