As a sailor and boat builder, I used to race regularly. I no longer do that but try to keep up with equipment changes. These days the highest end racing boats, up to around 80 feet or more, use carbon stays to support very tall masts. I've no word an durability but the people who own such boats can afford whatever they want. For the highest end bike racing it may be that carbon spokes are a viable option. For a step below the highest end racing, I would take a close look at durability. Just about everything in life is a compromise.