There are already some huge maps out there, Just Cause 2 and 3 both have maps at around 1000km2, and those games are beloved by their players. But if the next Cyberpunk game was announced with Night City now being the size of an actual large metropolis, say like New York, would you say that’s too big? What determines what “too big” is?
Funny, I have the opposite complaint about Fallout 4. In what is supposed to be a nuclear wasteland of a city where everyone is struggling to keep their small communities going, there are just too many people in such a small space to make this feel real. I liked Fallout 3 and New Vegas more because the world was properly empty, but still had so many things to discover.