It would be nice if there was a way to save and load data that isn't related to something already in the game. Use cases include:
-Creating a Bloodmoon type event (Or any in-game event) and then storing the amount of time left so that reloading the world doesn't reset the countdown.
-Creating a seasons mod/plugin and storing the current season and the time left in that season.
-Adding pollution via scripts and storing how much pollution is in the world.
-Creating a land protection plugin and storing the data for claims.
-Creating a factions plugin and storing the faction data.
-And many more that the community could come up with.