[nutrie]

That, and train tickets are a nightmare, unless you don’t care about the price.

[pantalaimon]

The ÖBB NightJet is surprisingly cheap, e.g. I payed 59€ for Berlin - Vienna in a sleeper coach

[dagw]

As long as you are just going between two cities with a direct train line it's trivial. The problem is if you are trying to take a train between two cities without a direct train line, like if you wanted to go from Berlin to for example Lisbon instead of Vienna.