Half the community is from the intelligence community, it’s in their interest to keep it nice so new players keep joining and leaking top secret technical specs
Dwarf fortress is genre defining, but it’s a different genre, colony simulation.
Factorio pretty much single handedly inspired the entire genre of automated factory games. Most of the others explicitly cite Factorio as inspiration or have clear influences from it.
Some credit to be given to the Minecraft redstone mod, of course.