Layering is an in-game technique to maximize a server population without causing a negative play experience. It has NOTHING to do with the backend.

TIL Server performance has nothing to do with the backend!

I'll spell this for you. That ingame technique...which moves people onto different layers...so that their data is fundamentally easier to query...leading to faster performance and lower queues...is called...data sharding. Which is on the backend.

It's readily apparent you have literally zero experience with software development in general, let alone any form of data management. Which is fine, but when someone boldface claims server performance has nothing to do with backend with this level of insistence, it makes a conversation impossible.