The whole point. If the new data on when Santorini (a.k.a. Thera, the same eruption) erupted is correct, the volcano went off a little before 1600 BCE, 100 years earlier than previously thought by those who try to link it to the Exodus.
Entire sets of links between ancient Greek, Egyptian, Judaic, and whoever the "mysterious others" were who did lots of things attributed to the Egyptians that the Egyptians weren't around to have done - goes up like a plume of pumice. Along with it, lots of dates in Juadaic history that are pegged on correlations with Greek and Egyptian written histories will need to be restudied.