Maybe it's the pilot in me but I don't like using line (or any equipment) that is so small, or light, that it could break when you need it the most. I really don't think in the bigger picture it "saves" all that much weight and if it breaks, will put you in a world of hurt.

Who needs the cost and agrivation of constantly inspecting and replacing all these new "high tech" non-covered lines all the time anyway? The first hurdle to winning is finishing. If your stuff is constantly breaking, what's the point? Yeah, it may be really cool and light but I've seen masts come down using that stuff for rigging and I've seen lots of busted traps, in the middle of a distance race when it's blowing, who needs that?

Is it really worth the trouble to replace a strong but heavy trap wire or line that never breaks, with a lighter high tech line that constantly needs inspection and replacement? That little bit of weight savings might make you one boat length faster but if (when) it breaks, you will lose a lot more than that.