Multiplayer Border Growth

Auto Border Growth is a very lightweight datapack that automatically increases the world border based on the number of players online.

Every hour, the border expands by an amount equal to the current player count.

You can also change the expansion rate using:

/scoreboard players set #rate bg_data <multiplier>

1 → normal speed 
2 → double expansion
0 → pauses expansion

• Perfect for survival and SMP servers
• No mods required
• Easy to tweak and understand