We don't race and there are no local events that forbid aerobars. If we were interested in PBP, we'd have to train without them, but uh no, we aren't.
Mild warning to those who lack the experience of the above. One death in the TdF from that. OK if you're alone. I saw a team captain in the Tour of Qatar come to the front to tell his guy not to pull like that. We hit a totally unexpected pothole on Saturday, hidden in mottled light. Luckily we were doing a good 35 while tucked and I pump my tires, so we just thumped right over it and didn't pinch flat. I'm a bit of a bug about bar grip. I always wrap my thumbs and hook my little finger behind the bar when on the hoods.