Depends on how often you sail in heavy air. I replace parts on my boat when it gets so bad I can't stand it anymore. That's happened more since I've been racing. But that's just me and I'm cheap.

I bet about 99% of the racers on here will tell you to replace it. Those answers are coming from people with almost perfect, new model boats.

Have you sailed with any of the multihull guys from LNYC? Look them up, they're a good group and always willing to help.