You're writing the server for a procedural space game where the coordinates are stored as numbers. As the ships get far from (0,0,0) people start to report that

You're writing the server for a procedural space game where the coordinates are stored as numbers. As the ships get far from (0,0,0) people start to report that the graphics get "jumpy" and gameplay rules break frequently. Or, your server keeps track of how long it's been running, in nanoseconds. When the server stays up for months, people start noticing weird precision issues and hard to replicate bugs around time.