>>96236966
most realms are huge, with multiple continents, numerous and large enough that by rough estimates the realm we know the most is like 7 times larger than earth or something, but the vast majority of it is unexplored/unreachable/uninhabitable/irrelevant so the narrative ends up focusing on like 1/20th or 1/8th of each realm

most realms are so large you can find pockets of the various races in all of them, but some are very much hardwired into some factions: the realm of light is practically controlled by elves, the realm of death is where the forces of nagash are obviously dominant, the realm of beasts is greenskins central

most storylines and worldbuilding we have have focused on aqshy and ghyran