Juan has far more experience outside of 121 than I do, so he's informative to me at least.
And my gut reaction is that in the year 2022 the airshow and warbird communities should be able to avoid midairs at major events. Nothing has come to light to change my mind yet. Although if the root cause did turn out to be a hypothetical collision with a non-participating drone that would be different, although it's something they'd have to account for going forward.