[hexatin]

> You can also have specialized "sleeper cars" that get you to your destination overnight, fresh and ready.

Trains have had this capability for decades, and that is a very mature technology, with the upside of also carrying far more people at a time than a car-based system would.

[inglor_cz]

I have taken them several times. Prague-Warsaw, Prague-Frankfurt, Vienna-Venezia, Prague-Tatras, Prague-Krakow.

First of all, trains shake a lot. I could at best take hourly naps, it was better than nothing, but far from optimal. The loud proclamations of station speakers whenever you stop somewhere do not help your sleep either.

Second, night trains are a paradise for opportunistic thieves. Yes, it is a solvable problem, but I haven't seen it solved.