You don't want rebarred concrete in Florida in a stadium. Ever. In a hurricane region, you need flexibility.
Look under Hard rock stadium (I did, I was curious)...all steel. Same with other large stadiums in the Southeast.
MAYBE fancy formed concrete steps in areas like Doak Campbell and Ben Hill Griffin? But you want that main structure made of flexible steel, absolutely.
See no further than the condo collapse in Miami in regards to how quickly concrete becomes brittle with heat/humidity. Add vibration to it? No way.
Steel outlast rebarred concrete 2-1. Just watch "Life after People" on Discovery.