Expanding upon number 8
Rainwater, whenever rain gets added.
Ceramic pots to store water for long periods of time before rotting (bugs/bacteria), just like food.
Cistern - Alternative to a well, when you are not able to find a vein of underground water, you can build a collection system that drains rainwater into an underground hole that fills from the bottom up, with a way to seal the top of the drain, to delay rot. (hardcore water mechanics and game logic required for this to be done properly).
Showers and sinks could be added to the list of things hearthlings need for quality of life, productivity, disease prevention and cooking.
Mops, if dirt and grime become a thing in the future- just giving your workers more work.
Panning for gold. Craft a pan, find a shallow river, search for gold dust and gold nuggets.
Expand engineering- Requiring Steam Engines, Pistons and Springs. Mine dirt and running it through a sluice to find the dust and nuggets within on a massive scale.
2 Likes