We tend to picture prehistoric technology as a progression of increasingly clever stone tools because stone is what survives, but rope may have been closer to infrastructure
Stone age peoples still existed until fairly recently in Africa and Australia, so stone age technology isn't prehistoric at all. What's prehistoric is stone age technology from other parts of the world.
Being from later developed part of Europe that is Finland. It is fun to consider that Iron age ended in 1000-1300 CE... So whole "ages" thing is really location dependent...
Problem is all those people likely have had various contacts with other cultures and it is unknown what impact that had.