Yeah eve handles it by slowing down time in-game. So each player has less actions for the server to handle per cycle.
Every game has their way of handling it. Cig is doing it via the replication layer and dynamic meshing. IE multiple servers talking to a “boss” server that scales based on needed load without Eve’s crutch of time scaling. Totally different technologies.
Eve’s solution worked based on what they had and needed at the time, but it’s old hat now.
Played since vanilla, took a break in the middle for a while, dragon flight hit the fun of Wow really well compared to the other recent expansions. I’ll probably stick around for war within too. They learned a lot of lessons from the mess that was shadow lands.