My primary reason for having aerobars is primarily because of wind issues, which are pretty consistent around here. I also ride a lot in my drops but only if I am riding solor, or with other experienced riders and I if I am not pulling but drafting. I don't often rode in a paceline or a group large enough to make a paceline. The two ladies I ride with and I will take turns pulling and drafting in a stiff wind, but none of us will ride in drops or aerobars if we are pulling. When I ride solo I use both my drops and aerobars as a method of moving around while on the bike. It sort of spreads the effort and wear and tear around.