Booking international train trips in the EU like connecting flights at once. You book the entire trip from perhaps different rail operators at once and get relatively secured connections.

Especially it should imo include that you have to be rebooked onto the next best connection if you miss one because of a delay which currently isn't really the case. Idk if that specific clause is in there but some part of the EU is supposedly working on a platform that at least should allow purchasing tickets for routes across multiple carriers and countries in one ticket.