I guess it can already be argued that Roman Kingdom != Roman Republic != Roman Empire. And if we continue this logic even further, they are all != Eastern Roman

I guess it can already be argued that Roman Kingdom != Roman Republic != Roman Empire. And if we continue this logic even further, they are all != Eastern Roman Empire. But the name itself is a source of pride and everyone after still wants to claim that they're continuation of it, so much that we have more than one ship of Theseus by the end.