Night trains are amazing. It's basically a mobile hotel room that's a little cramped, but spits you out in another country at 7:00am.
You may be woken by someone yelling something in Romanian at 2:00am when the train stops. And you may be woken for passport control at 3:00am, so try not to be naked when that happens. (Lessons learned)
Some snacks, a bottle of wine, and a good time. Night train!
really we just need more railways in general, many parts are literally just unable to squeeze in any more trains and yet barely anything new is being built.. In a sensible world we should have started building a high speed network between the capitals 10 years ago.
From my student years I even know the names of the 2 night trains between Bratislava and Košice - Zemplín (top route) and Poľana (bottom route). Sigh, sometimes I miss those travels