Designed like a you were living inside of a building sim?
Games like sim city, pharaoh, civilization, and banished have worlds that are constantly evolving based off certain AI. What if you could play as a citizen in one of those sorts of games?
For one thing, wildlife would probably act differently. If you went to get lumber from an area for your profession, the trees you chopped down wouldn't regrow very quickly. They would naturally come back over time based off the existence of other trees using some sort of logic like "random tile adjacent to existing tree (exclude tiles that are currently in use), plant 1 seedling per 6 hours of model 1-6."
Deer could be over hunted and you may have to wait a while for the population to rebound in an area.
These sorts of activities would result in changes in near by NPC villages. If you over harvest lumber, they may freeze to death during the winter. Over hunt? They may starve or be more susceptible to plagues. This would probably open up quests like, "help burn the dead bodies" or "go find a priest to bless our dead".
NPCs would be programmed to seek out and develop areas like if players or npcs find a gold vein, boom towns might pop up around it because the AI detects that it's high value land with low price or something.
Meanwhile, enemy NPCs would be out to destroy these places like... orcs razing cities. If players don't protect the city... it will burn down and be lost, possibly, forever.
The designers of the game would, essentially, have a bit of a hands off approach to the game. If people are over farming a region and cause a dust bowl that sends their shard back into the dark ages? Oh well. They shouldn't have done that. A dragon destroyed the capital city of the game? Neat! I wonder if the players will try to rebuild it.
Essentially, patches would be about adding things like quest diversity. Like, a inn keeper might have a quest for the first 5 players who talks to her to kill 10 rats. Devs would add things like tending the bar for a shift or collecting bottles from tables or whatever inn keeper themed random quests they could come up with.
Players could do anything from the mundane such as helping a farmer or as epic as joining a raid party to defeat a dragon and retake the smoldering ruins of a capital city.
Would you enjoy playing in a world where everything was in a constant state of change? Where forests might randomly burn down because of a drought? Where capital cities might be forever lost? Where the prices of goods could fluctuate wildly due to scarcity?