Say the Winter War goes disastrously wrong for Finland and the USSR annexes the whole thing, merging it with the Karelian ASSR. Many decades later, this Finland breaks away from the Soviet Union along with the other union republics.
How many Finns and Swedes would leave during the chaos of the Soviet invasion? How many Russians (and other Soviet nationalities) would settle? Would they largely concentrate in Helsinki and the Karelian isthmus, or also move to the other large cities like Tampere and Oulu? Would eastern Karelia see even a small shift away from the OTL dominance of Russians?
How many Finns and Swedes would leave during the chaos of the Soviet invasion? How many Russians (and other Soviet nationalities) would settle? Would they largely concentrate in Helsinki and the Karelian isthmus, or also move to the other large cities like Tampere and Oulu? Would eastern Karelia see even a small shift away from the OTL dominance of Russians?