I did not say that they never transitioned to a pastoral lifestyle, I said that the original peoples clearly migrated as a nomadic tribe, which is substantiated by a lot of evidence. Unless you believe in the Out of India Theory which is peddled by members of the far-right in order to justify their political supremacy.

From reading David Anthony's book and others... The evidence seems to be that early proto-Indo-Iranian speakers traded and blended with the Bactria–Margiana Archaeological Complex (BMAC) in central Asia on their way to the subcontinent and the Persian Gulf. BMAC was a settled agrarian society with extensive trade networks and an unknown spoken language that probably lent a whole pile of words and concepts into the Indo-Aryan culture (multiple times in different eras, too, apparently).

A somewhat similar process likely happened in the settling of Europe the Yamnaya culture passed through, integrated with, displaced, or dominated the Cucuteni–Trypillia culture and other settled agriculture societies in the Danube & Balkans regions.

So are you saying that they weren’t nomads when they migrated to India (or invaded it)?

> Bhagavad Gita is a short read, you can read and find there are no mentions of nomadic lifestyles in that.

Which was written between 5th century BCE to the 2nd century BCE? So at least 1000 years Indo-European migrations. How is that relevant?