Originally Posted by Waterhorse

More complicated usually means less safe - particularly when human interaction happens. Even under current rules things happen. I was turned through 20 Aob at 50 feet the other early. I was in an A321 following an A319. We had standard separation but it was an ideal day for a vortex encounter - wind less than 5 knots and coming from 30 degrees off runway heading. It didn't last long but we had run out of control authority and had to hang there for 2-3 seconds in a very poor place. My FO was distracted by the event for the whole flight after that. He had run out of experience and ability. Let's hope this commercially driven reduction in separation doesn't hurt people in the real world. Modelling cannot recreate real life fully.