While it does mess with things when you’re trying to get that kind of feeling it does open up new opportunities. Such as in a setting I was making there was an empire that collapsed around 100 years ago. That’s long enough there aren’t really any humans or other normal life span races people around to remember what it was like outside of stories. But the elves and other long lived races do remember and that can create very different attitudes between people about how they think about the empire and if they miss it’s stability or are happy to be free of it on top of the differences that exist naturally between the different cultures.