Millennium Attack: A New Idea in the Petrov?

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samwri

I just played a rapid game on a different site where my opponent played an opening called the Millennium Attack against my Petrov Defense. At first, I didn't think it was good because it blocks the d-pawn, but after analyzing it I found that the engine likes it and Grishuck even beat Caruana with it in a 2018 rapid game. I couldn't find many resources online about this opening as it seems to be a fairly new idea so I am posting this to see if anyone has experience in this line. Below is Grishuck's game.

Uhohspaghettio1

Iichess has over 520 games with it going back to at least 1999 and a few in 2000 - but probably no sooner hence the name.