Top club level tennis players will go thru multiple racquets and shoes during the season. Top pros on tour may change racquets several times in a single match. Mostly for the fresh strings. Tennis balls only go around 9 games in a tour match. When I was a working musician, I changed guitar strings every week, now yearly at best. My point is that these are all consumable goods by design. The harder or more they are used, the faster they wear out or break down. In skiing my feeling is that gloves, ropes and skis are the consumables. Add up all the costs of skiing, boat gas, depreciation, maintenance, driving to the lake, tournament fees, etc. A new ski every year or two is just another that should be expected. When used as designed, it will wear out.