Again, NOT what I wrote and NOT what I meant. Not every nation has existed since the beginning of time. Some are ancient, like the Greeks, Chinese, Japanese, etc. Some are newer, like the Americans, Brazilians, etc. Some exist to this day, some do not. But every nation has its history, and it is not the history of just one regime or entity.
Yes. Because Greece and Turkey are two different nations. And if you are going to say that Turkey was settled by Greeks before the Turks came - see the answer above. I was replying to the statement that "no civilization has existed from antiquity to our time", and I was giving Greece as an example of this particular case. I did not imply every civilization has existed from ancient times. So I really don't understand what answer you were trying to give me here.
Again, NOT what I said. I did not talk about specific locations. I talked about nations and cultures.
Of course cultures have influenced each other over the years, of course histories of different nations and cultures overlap, but it still does not give us the right to say that basically nations do not exist, and we can just mix them all together based on the fact they are on the same continent.
In your example Greece to Byzantines makes sense. But then Byzantines to Ottomans or Russia is already very problematic. The Ottomans may be less problematic because of the same location and the same cities (they even kept calling Istanbul Konstantiniyye), but still we are talking about people who have drastically changed the culture of the place. It is just like having the Iroquois turn into the Americans. Same location, but it is a 180 degree change in pretty much everything.
I'd rather play with the same civ from antiquity to the end of the game. It also makes more sense gameplay-wise. Imagine you are playing "Cities Skylines", and you are building you city from scratch. Then, all of a sudden, the game tells you, OK, enough, you can't continue with this city anymore, from now on, you are building another city. Or the game just randomly redesigns your city, changing the districts and buildings to something else.