Many hurdles still to overcome?
A few years ago, EGCC handled the Champions League football thingy.
About 70,000 Italians turned up over 2 days in about 200 extra airliners and 60 biz-jets.
No simulations were laid on, we just did it.
Like the ignition of The Olympic Flame, in ATC terms, this is just a flash in the pan.
As the late Ron Ridler would have said,....."Shut up and get on with it"!