Sign if you would of Prefered this over the data Center shuffle

[Adrestia]

A lot of modern MMO's just use datacenters now with one big megaserver that will split and create new server clusters when needed. I never played one that had 2k people shown at once (and doubtful there is any that is like that), but games like ESO and DoAC allowed you to see a lot of people on your screen, so it's definitely possible if the game is optimized and if the tech/hardware is there.

https://www.youtube.com/watch?v=3O56g8KC6CM