I have been talking for a while with others and came to one simple conclusion, the game does not need boats or trains in its current state. Not saying it would be cool to have them. Just that the current need for them is not there because of the cheaper means of moving products.
Currently, you can carry a stack of 20 rocks, wood, steel, and several other carry only items. This means you can carry 5 m^3 of any carry only objects. Transitioning from carrying rocks in hand to a cart, your would increase this several times over. By the time you get to the truck, you can carry just about 520 rocks, or 130 m^3 worth of space. A truck that takes up roughly 12 m^3 of space having the ability to carry 130 m^3 of space is a bit much.
I propose that the default stack limit for carrying only items be reduced to 4 (from 20) to make it a bit more realistic, and then continue that forward, with the truck being able to carry somewhere in the ballpark of 200ish ( If we go with 260, that would mean the truck would have 65 m^3 space of carrying capacity.) . If this were to happen, then the need for boats and trains would increase with larger carrying capacity. Yes, it would suck if the default was changed from 20 to 4, but this would also extend the Eco experience, force more cooperation between others, and better simulate a society expanding through the ages.External link →