I could understand having carving only trails, but so far, my favorite person to carve with is on the highschool ski team. Well, both him and my brother, who skis also. They can both lay a tight line (or two, rather) and both are very capable of booting out for carving so tightly (just trying to illustrate their carving abilities), the only time they side-slip is to stop. Having boarder-only or skier-only trails/mountains is to say that boarders and skiers can't go down the hill in the same fashion, when in reality, there are both proficient people and morons in both categories.