Lots of mentions of carbon bars. Honestly I've never considered them before. Is the main advantage they have over alloy that they dampen more road chatter, are lighter, can be shaped more aerodynamically for the same weight, look bling, or something else?

I have a set of alloy 38cm Zipps, about the cheapest with a shape I wanted that was predrilled for Di2, on my Roubaix with Future Shock. Probably wouldn't feel a noticeable difference going carbon compared to a less forgiving frame? I don't have any real aero or weight weenie bikes, and the Roubaix is my default choice for the longest days.