Sure. An example is Hiroshima and Nagasaki. And even Fallout. The intro doesn't even show that the ENTIRE world was destroyed. Of course, the area where Gelu and Kilgor collided suffered the most damage. But nowhere does it say that Enroth was COMPLETELY destroyed. Therefore, we still have room for imagination.

So, did all the units change like that because of the radiation?
And I think the idea with ERM is quite feasible, i.e., even if we can't find someone who knows ERM, there's a program that generates simple scripts, and we can ask professionals about complex scripts... and I can do something too! AND IN GENERAL, THE ERA AFTER THE RIFT AND BEFORE THE "FOUNDATION" OF ASHAN COULD VERY WELL BE WOG!!!!!!

For example, I could make it so that the Swamp creatures can hire black dragons, witches, and assassins, and Inferno can hire nightmares (like in Heroes 5).