The piece is up at India Today. The headline and title are of course optimized for clicks. I would, for example, say that the Indo-Aryans came from the west, not the West.
In the course of writing this it has become clear that many people have very specific commitments on this issue. I think it is clear I do not. Genetic inference methods have wide shoulders of confidence in particular dates. So I’ll leave it to those with more archaeological knowledge to argue over specific date. But it strikes me that the dates point to a likelihood that much of the expansion and diversification of Indo-Aryans may precede their expansion into the Gangetic plain ~1500 BCE, the date preferred by many scholars.
Apparently we shouldn’t have to wait too long for ancient DNA from Rakighari (months, not years). But I doubt that will settle anything, as opposed to being preliminary and setting off new debates.