Can I ride a carving board in powder?

You can, but it won't be enjoyable or efficient. The narrow waist, stiff flex, and lack of rocker mean the board will sink rather than float, requiring you to lean back aggressively to keep the nose up — which fights the board's design and exhausts you quickly. In light powder (a few inches), you can manage by staying centered and making shorter turns. In deep powder, a carving board is genuinely a poor choice. If you encounter regular powder conditions, you need a different board for those days.