Captain Midnight
SOC-12
I agree, there's probably not enough call for "Made on Mora" products on Capital to justify anything besides the occasional shipment -- artworks, handcrafts, wines, that sort of thing. (I'm using that as an example, just because I know it's a long route and people will have heard of the endpoints.) It certainly wouldn't sustain trade, as the value of the entire shipments won't be high enough to allow for enough profit.why would they make such journeys? surely there is no reason for any material good to be shipped such distances, and the only passengers who might have a need to spend half a year in transit would be dukes and archdukes, and perhaps imperial inspectors - and they would have their own transportation and would not use commercial passenger liners.
You might have ships that have regular routes that extend that far, but the vast majority of their cargo and passenger loads will be picked up or delivered to points along the route. Keeping to a schedule will become very important, and managing the presale of cargo space or passenger accommodations is going to get very dicey -- what if someone two stops earlier in the route booked all your available staterooms, and there's no place for the passengers who bought passage? There are solutions, some of them developed by present-day shippers, but they're not very neat or elegant. Much will depend on communication coming along the route, and determining what frequency other ships will be traveling the same route.
Transferring passengers and cargo from one ship to another is certainly possible, but it's a hassle for all involved. It's not so much of a hassle that you'd rather commit your ships to being on that route from start to end, but it's still not inconsequential. A particular shipper may handle goods or passengers, but it's doubtful that they would stay with a specific ship.