Reclamation

Minecraft is a world in stasis, unchanging from the day you first spawn in a forest to the thousandth day since you slew the Ender Dragon.

Reclamation, through a datapack-configurable library, causes blocks in the vicinity of players to shift and change over time in order to add a little bit more life to the world.

By altering the gamerule settings and the decay entries, a variety of different results can be produced, from a world rapidly falling apart under the crushing weight of time, to a nightmarish grey goo infection spreading under your feet, to a simple useful building tool able to provide more complex results than simple visual noise.