So headlines like this always make me smile a bit.
But still, new evidence is always super interesting.
> While Grimm believed that many folktales were likely to be thousands of years old, only a tiny minority can be traced back to before the emergence of the literary fairy tale in the sixteenth and seventeenth centuries.
The "reconstructions" of the authors are based on fantasy. They try to sidestep the massive problem of possible literary origins by manufacturing data with their magical phylogenetic device. It's garbage in, garbage out.