Sardinia founder event

Razib looks at Rémi Tournebize, Gillian Chu, Priya Moorjani about Founder Events - when a new population is formed by a subset of individuals from a larger one or when the original population goes through a reduction in size due to a bottleneck. Razib points out the Basques, whose founder-event was under Rome (or maybe reacting to Carthage, Rome, and nearby Gauls). Secondary State Formation mayhap.

These three find a Founder Event for Sardinia too. I'd thought the latest such Event was when the Punic Africa swamped its population. I'd also assumed the IndoEuropean DNA here was light.

But no: ~3,400-4,900 years ago [2900-1400 BC] ... coincident with the appearance of the Beaker culture on the island. So I'm looking at something like Villanova or, indeed, those Basques before Rome when/where an Indo-European blood elite brings in cultural elements, but doesn't change the DNA except along the male lineages. Probably doesn't change the language either. As to that drastic Punic change, perhaps that was drawn out so not counting as a founding event.