I'd question the likelyhood of a person being able to compete at a world level if they start in their 30s. However, they might experience almost lifelong improv

I'd question the likelyhood of a person being able to compete at a world level if they start in their 30s. However, they might experience almost lifelong improvement rather than peaking in their 30s and be able to climb a wide range of grades but I don't expect to see them competing in Innsbruck.