Imagine what it would be like at a lot of airports in the U.S. where you've got GA traffic like Cessna 172's taxiing around as well....
I fly out of a Class B where in winter the winds switch around occasionally to that 1/10th of the time that the heavies have to trundle over past the GA side of the airport. It's always a real-eyeopener for pax
when you're taking a friend out for a joy flight in something like a 172 and when you're doing your runup, a JAL 747 trundles past with 4 engines spooling
I came in last Thursday and was sitting behind a 172 waiting to make a call to ground and had a 767 right behind me.