The Extreme Caro-Kann: Attacking Black with 3.f3

Qb6 is my weapon against the Fantasy. That's a relatively new move and not something Maroczy had to deal with when he began playing 3.f3 a hundred years ago. It's a modern, engine-approved way to battle f3. Nepo had white against Ivanchuk in this game from 2010. It's his turn on move 19 in this opposite sides castling madness. His king is safe on h1, right? How would you evaluate the position?

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