nedjer
Adventurer
Want to know how much metamorphic rock you can tunnel away in a weeks time use goblin slave labor? It's out there. Want to know how fast you can travel between two cities using a 90' schooner with a 20 man crew? It's out there. Want to know the amount you can safely devalue your currency by - literally making money by minting coins - if you have an 100 year old established kingdom with good credit? It's out there. Want to know how much income you earn from running an inn on an established trade route, or maybe if you run a theives guild in a capital city, or do you want to know the nesting habits of stirges? It's all out there.
but that's where the simulationist approach maybe falls down/ loses all simulation? How much you can devalue your currency or how far you can go on a schooner has to be worked out on the fly to become consistent. There are any number of modifiers to apply to such situations and a quick agreement about the main ones on the spot seems more likely to make a good fit than a generalisation, which probably doesn't match your campaign or plot/s.
While we're on it - though Stirges nest, 1e forgot to mention that Tiger Stirges don't nest; they drool aneasthetic on the necks of the sleeping, then lodge themselves at the top of the spine where they claw into, melt away and replace the upper vertebrae. They then penetrate the host's brain before laying their eggs into the spinal column and feeding themselves and their eggs from the host's brain.