I'm an intermediate rider — should I buy a carving board to improve my carving?

Generally, no. A carving board's stiff flex and camber profile will likely fight you, making it harder to develop proper technique rather than easier. You'll progress faster on a medium-flex all-mountain board with a hybrid camber profile that offers some edge hold while remaining forgiving. Once you can consistently lay down clean carved turns on a more forgiving board — where the board tracks on its edge without skidding — you'll be ready to transition to a dedicated carving board and will actually benefit from its performance.