Recently I took a night train for the first time since I was a teen instead of a 40 minute flight for the comfort levels and the emissions, and it was surprisingly comfortable. Not a perfect night's sleep (I'm a light sleeper), but perfectly enjoyable.
PS: Sadly I doubt the Ukrainian night trains are all running at the moment..
They’re cheap, reliable, and comfortable. Even in a war.
The only frustrating thing is they don’t seem to be doing first class cabins going across the border into Poland anymore (because of the war), and taking a first class cabin across Ukraine to Lviv and then another connection across the border is not particularly convenient.
(I've been, but it was a brief visit a long time ago.)
Who the hell are you to tell me where my priorities should lie?
International connections work too. My mother recently came to visit it us here. She took an intercity from Przemyśl, Poland on the way here and then a sleeper to Wien, Austria on the way back. Both arrived more or less on time.