I think that for example it would be useful for servers to use the command /worldborder boundary to change all worlds regardless of where the command is executed. For example, automate this through execution using the console on Minecraft servers. Figuratively:
/worldborder add 10 30 world_the_end # It's add 10 blocks for global world_the_end border in 30 seconds
/worldborder add 5 23 world_nether # It's add 5 blocks for global world_nether border in 23 second
/worldborder add 100 46 world # It's add 100 blocks for global world border in 46 seconds