Why do park boards use extruded bases instead of sintered?

Extruded bases are the standard for park boards because they're much easier and cheaper to repair after rail damage. A P-tex candle fixes most gouges in minutes. Sintered bases, while faster, require professional repair for significant damage and need regular waxing to maintain speed. In the park, where features are close together and you're not doing long traverses, the speed difference between extruded and sintered is minimal. The low-maintenance nature of extruded bases is a practical advantage for riders who'd rather hit features than tune gear.