Very low wetsuit tear risk. And, the upside is huge. Just don't accidentally pull the top of your one-piece tri suit with your wetsuit. That will be a scary experience that a wetsuit stripper can never un-see.

Nutrition is another big and individual topic. I try to aim for about 1,000 calorie intake during the bike. I do all liquid, because I have not found any solid that works for me. But I learned a couple weeks ago that I can go very low cal when my bike ejected everything.