Public Transport

More walls means less wagon space, also if it was interested only for night travel, why half the wagon is seats? How is that better than a night wagon filled with multiple story beds and one filled with seating? And why are there giant screens if the wagon is interested for sleeping?

The seats recline into beds, similar to business class seating on long haul flights.

A typical night train will probably run for something like 12 hours, meaning that you won't want to be lying down fully for the whole trip.

On night trains, you typically book either a seat or a bed. The seats are an downright awful experience for anyone spending the night on the train. Seating-only wagons really have no purpose on night trains.

Their website shows and mentions daytime travel as well. If it is intended only for night travel makes a bit more sense, but still seems like a gadgetbahn.

See the previous note about night trains typically running for both sleeping hours and non-sleeping hours.

Again, I don't think these trains are intended for general purpose travel, they are specifically designed to be a better experience for overnight trips. I would not want to see them replace regular trains, that would clearly be a mistake.

I don't think it's good engineering practice to just decided half your product will be unusable/unacceptable

This is provably false - if this were true, then every bathroom would be built to full accessibility standards, but they are not. Some bathrooms get built to full accessibility standards, and the others only accommodate the majority of the population.

Good accessibility engineering means that your product can accommodate people with different requirements. With half of the seating being available without having the ability to climb ladders, this certainly fulfils that requirement.