Thanks!
It's actually a lot more complicated for games like mine, with lots of events on top of each other. Imagine you have one event in one room tied to a side-quest and another one tied to the main quest in another room.
If both rooms are on the same map, the events might trigger all wrong if, by coincidence, they have their trigger conditions activated at the same time.
Anyway, it's a logistical nightmare that is far easier to handle with a one map per room system.
Next game will be on RPGM MZ though, with a 2k maps limits rather than MV's 999 one, so plenty of room to work with