I think some people miss the point that a small team (any team, but especially a small team) has a restricted amount of time available.
Yes we can simply ignore the ‘ship and planes’ dlc and stick to trains. However it does come at a cost, opportunity cost. Instead of having ships and planes they could have nation packs or graphical flavour (churches and other landmarks) or intricate industry schemes or even additional gameplay elements.
If only a few people want planes and ships, it would be a waste of their resources to actually make them, as they could make more of us happy with different dlcs.
So hence I would generally leave them out and have more general stuff in that is useful for the majority of players.
Additionally it’s better for Urban Games as a business decision, but that’s a different point altogether.
