Yup, and that's what made the U2 GA situations different than the traditional "one big stage" situation I dealt with for Bowie 1990... The 2015 and 2018 tours used the same staging, and technically, you could stand wherever you wanted - outside of the "Red Zone" you mention. It was still best to be close to the main stage, but they used so much of the ramp/B stage that it wasn't a clear "place to be". For all my U2 2015/18 shows, I'd just show up when I felt like it, and I always had awesome sightlines. Yup - I forgot her! Probably a bunch of other examples, too. I think Foo Fighters shows are GA for the entire floor with a traditional setup. Not sure of any other big acts who do that. Also not sure why these situations seem less dire/violent than they did in the past. Better security? Less boozing/drugging pre-show? Dunno, but I don't get the sense GA shows are chaotic like they used to be. Maybe it's age - which is much of the reason I don't fear fights on the field for the Stones. Even though the Foo Fighters get a reasonably young crowd, much of the audience is still 40s/50s, and it's just a given that there'll be fewer fights with a bunch of fogies!