Increase of Assets on maps

[Deveryn]

I have a question. What causes some games to be able to do this and other not?

Why is it that a game like WoW can have entire continents with multiple major cities on a single load screen free insurance, but other games can't even have an upper and lower level of a single city be connected without separate instances? Let alone going from zone to zone without loading in.

And you can't say that WoW is simply a bigger game with a bigger budget, because they've had this in place from the beginning.

WoW was made to be simpler and more accessible from the start. The aesthetic was never one of great detail, so it's always been less resource intensive.