> With more DNA data, we wouldn't necessarily need linguistic characteristics to chart language ancestory, we could also look at the DNA evidence.

DNA evidence tends to favor the Steppe hypothesis.

> We know that the romans borrowed heavily from the greeks. That rome and greeks were closely related is well known. Everything from law to literature to religion. Not sure about the Rig Veda.

There are in fact some instances where Archaic Rome is closer to Vedic India than it is to Greece - the horse sacrifice, regulations around high priests and kings, etc. You can dismiss the similarities between Greece and Rome as due to borrowing, but you can't do the same with Rome and India.

> That describes a lot of cultures.

I specifically said those discrete elements weren't sufficient to convey the "vibe", so yeah.