you could go on forever
you forget the carriages seem to have an underground as well :S
how to the tail enders manage dreadlocks and get haircuts? why arent they all looking like holocaust survivors with dirt, blood, puss, sweat, excrement etc all over them?
some of the carriages are big enough to fit cows inside like wtf cows are huge, okay some trains have pretty big carriages.
the double decker carriages in Switzerland are huge in length but they are still narrow as anything.
how would a train without universal carriage widths be able to travel around the world, who built the track, does the track go across the frozen oceans? how does the track not get pulled apart by the eaths plates moving around.
you could go on for almost forever, even about series you think are "good" you might as well just get the popcorn out and believe
the only place this train would be believable is like mars or somewhere where gravity is different
the train should probably be about 50 cars long with how many people weve seen on it, first class is like 8 or something...