Why would we want to reproduce the exact same model? Maybe more, smaller trains would do just fine instead of a single gigantic one. Also, I'd say trains could

Why would we want to reproduce the exact same model? Maybe more, smaller trains would do just fine instead of a single gigantic one. Also, I'd say trains could be easier to automate, so having several smaller trains instead of a single huge one wouldn't be an issue, as you wouldn't add the cost of personnel. Trains can also go to different places easier, so you wouldn't have to move container several times.