I sometimes her proposals like that, and it sounds kind of attractive - you get into your pod and forget everything until you arrive.

But in a sense, night trains are already like that. Since they can stop at multiple places, you can depart and arrive downtown. In the meantime you’re in your cabin and forget everything.

Entering the train „with“ the pod instead of just yourself is gonna make boarding and alighting take forever, and the logistics of storing and moving the pods are a nightmare. It’s going to reduce capacity by a lot because you cannot optimize the layout and every pod needs to be „insertable“ as a whole. (3x reduction in capacity means 3x increase in ticket cost).

Homologation is going to be a nightmare - in Europe, realistically, it’s gonna take more than 10 years or develop something like that. You need a new infrastructure because right now stations are for people - that’ll probably take 20 years (in Europe).

Besides, sleeper trains really are modular already, using existing standard rail infrastructure. Wagons are the natural unit of a train consist.

Ideally, we end up with a big enough network of sleeper lines that it makes sense for ÖBB, European Sleeper, or whichever operator to have the luxury of taking some wagons out for maintenance and standby, and even scale up and down depending on the season.